Gallen (5-8) picked up the win Friday, surrendering seven runs on 10 hits and a walk over five innings in a 14-8 victory over the Rockies. He struck out five.
In a classic Coors Field offensive free-for-all, Gallen got rocked for six runs in the fourth inning, including homers by Ryan McMahon and Mickey Moniak. Arizona retook the lead in the top of the fifth, however, and the right-hander got through the minimum frames necessary to qualify for the win. The seven runs allowed tied Gallen's season-worst performance, and he'll carry a 5.60 ERA, 1.40 WHIP and 86:41 K:BB through 91.2 innings into his next outing, which lines up to come on the road next week against the White Sox.
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Diamondbacks' Zac Gallen: Fades in seventh inning
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Gallen allowed four runs on six hits and four walks while striking out six over 6.1 innings in a no-decision Saturday versus the Padres.
Gallen pitched well until the seventh inning, when he allowed three of the first four batters he faced to reach base. Ryan Thompson couldn't stop the Padres' rally, which cost Gallen a chance at the win, though the Diamondbacks pieced together a comeback for a walk-off in the ninth. This was the fourth time Gallen has walked a season-high four batters, and it continues a rough stretch for him, as he's now allowed four or more runs in six of his last seven starts. He's at a 5.19 ERA, 1.35 WHIP and 81:40 K:BB across 86.2 innings through 15 starts this season. His next outing is projected to be at Colorado.
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Diamondbacks' Zac Gallen: Allows three homers in loss
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Gallen (4-8) took the loss against the Reds on Sunday, allowing four runs on six hits and three walks with five strikeouts over 6.2 innings.
Gallen was locked in a 2-2 tie through six innings before surrendering a go-ahead two-run homer to Matt McLain with two outs in the seventh. The 29-year-old was ultimately undone by the long ball and continues to struggle with his control, having issued three or more free passes in eight of 14 starts this season. He'll carry a 5.15 ERA, 1.33 WHIP and 75:36 K:BB across 80.1 innings into a home matchup with the Padres next weekend.
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Diamondbacks' Zac Gallen: Picks up fourth win
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Gallen (4-7) earned the win Tuesday in Atlanta after giving up three runs (one earned) on four hits and one walk over seven innings. He struck out four.
The right-hander pounded the zone with 65 of his 89 pitches going for strikes, and the single walk marks the first time he hasn't issued multiple free passes in a start since April 2. Gallen entered Tuesday with an 8.02 ERA and 17:11 K:BB in his previous four starts, but he was able to get back in the win column with his fifth quality start of the campaign. He'll carry a 5.13 ERA and 1.33 WHIP over 73.2 innings into his next start, which tentatively lines up for Sunday in Cincinnati.
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Diamondbacks' Zac Gallen: Stumbles late in loss
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Gallen (3-7) took the loss against the Pirates on Wednesday, allowing six runs (five earned) on six hits and three walks with three strikeouts over five innings.
Gallen entered the sixth inning with a shot at a quality start but was unable to record an out and was ultimately charged with three runs in the frame. The 29-year-old has now allowed at least four earned runs in four consecutive outings and in seven of his 12 starts this season. He'll take a disappointing 5.54 ERA, 1.40 WHIP and 66:32 K:BB across 66.2 innings into a road matchup with Atlanta next week.
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Diamondbacks' Zac Gallen: Pairs well with Herrera
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Arizona manager Torey Lovullo had Jose Herrera catch Gallen for Friday's series opener against St. Louis, after the pitcher had struggled in his previous outing, Joe Harris of MLB.com reports. The right-hander threw five strong innings before running into trouble in the sixth in a 4-3 loss.
It's been a rough start to the 2025 season for Gallen, whose 5.25 ERA is the highest its been since he became a full-season starter in the majors. However, when Herrera has caught him, Gallen's ERA is 3.56 compared to 6.89 when Gabriel Moreno is behind the dish. "We got a pretty good relationship," Gallen said. "I think he knows what I'm looking for out of the shapes of my pitches. He kind of knows when certain things aren't right, not necessarily to shy away from those pitches, but use them a little differently. So yeah, there's definitely a comfort there." Given the pitcher's results thus far, Lovullo may opt to pair Gallen and Herrera going forward.
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Diamondbacks' Zac Gallen: Rocked by lowly Rockies
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Gallen allowed six runs on eight hits and two walks while striking out five batters over five innings in a no-decision against Colorado on Saturday.
Gallen fell behind early, as a pair of Rockies homers resulted in three first-inning runs. The right-hander went on to give up two more long balls before his outing came to an end, though an explosive Arizona offense saved Gallen from taking a second straight loss. Gallen has had an up-and-down season so far -- he's collected four quality starts but has also surrendered four or more runs in five different outings. Overall, he's pitched to an uncharacteristically poor 5.14 ERA, which is on pace to be the worst mark of his career by a wide margin.
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Diamondbacks' Zac Gallen: Wins again over Mets
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Gallen (3-4) allowed a run on two hits and three walks while striking out six over seven innings to earn the win over the Mets on Tuesday.
Gallen posted his fourth quality start of the season, and this was his longest outing yet. He threw 64 of 101 pitches for strikes as he defeated the Mets for the second start in a row. The right-hander has allowed just two runs over his last 13 innings, trimming his ERA to 4.37 with a 1.21 WHIP and 49:21 K:BB across 45.1 innings over eight outings this season. Gallen will need to cut back on walks -- his 4.2 BB/9 is the highest of his career and noticeably above the elevated 3.3 BB/9 he had in 2024. He'll have a tough outing on tap this weekend, as he is projected to make his next start at home versus the Dodgers.
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Diamondbacks' Zac Gallen: Takes fourth loss Friday
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Gallen (1-4) took the loss Friday against Atlanta after allowing three runs on four hits and two walks in five innings. He struck out six.
Gallen kept the hard contact in check to a degree -- it was just his second start this year in which didn't give up a home run -- but he yielded two RBI doubles during Atlanta's three-run second inning. The right-hander was able to tie a season high with 103 pitches, but it was his fourth consecutive outing with multiple walks allowed. Gallen has a disappointing 5.57 ERA, 1.39 WHIP and 35:15 K:BB over 32.1 frames in 2025, and things won't get much easier in his next scheduled appearance on the road versus the Mets.
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Diamondbacks' Zac Gallen: Hit hard by Cubbies
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Gallen (1-3) took the loss Saturday, coughing up six runs on seven hits and two walks over six innings as the Diamondbacks fell 6-2 to the Cubs. He struck out five.
Four of the hits off Gallen went for extra bases, including back-to-back homers by Seiya Suzuki and Michael Busch in the second inning. The right-hander has been tagged for at least four runs in three of his first five starts this season, leaving him with a 5.60 ERA, 1.43 WHIP and 29:13 K:BB through 27.1 innings. Gallen will look to rebound in his next outing, which is scheduled to come at home next weekend against Atlanta.
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Diamondbacks' Zac Gallen: Quality start in no-decision
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Gallen took a no-decision Sunday against the Brewers. He struck out five over six innings while allowing two runs on five hits and three walks.
The Arizona right-hander looked sharper in this 89-pitch outing, firing 56 strikes to bag his second quality start of the season. The only blemish on Gallen's outing was a second inning two-run homer by William Contreras, which snuck out of the park, measuring 375 feet. With this effort, Gallen lowered his season ERA from 5.28 to 4.64 and will look to keep rolling in his next start, currently slated to be at the Cubs this weekend.
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Diamondbacks' Zac Gallen: Struggles with control vs. Orioles
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Gallen (1-2) allowed five runs on seven hits and four walks while striking out two batters over 4.2 innings in a loss to Baltimore on Monday.
Gallen's outing was a stark contrast to his 13-punchout, zero-walk win over the Yankees last Wednesday. Against the Orioles, the right-hander struggled mightily with his control, throwing only 50 of 96 pitches for strikes and issuing four free passes. Two of the four batters Gallen walked came around to score, and he failed to complete five frames for the second time in three starts. Despite Gallen's dominant victory last week against New York, his ERA stands at 5.28 on the season, which reflects how poor his other two outings have been. He'll try to rebound the next time he takes the mound, which is lined up to be Sunday versus Milwaukee.
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Diamondbacks' Zac Gallen: Makes final spring start
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Gallen allowed one run on five hits and two walks while striking out two over 4.1 innings in Thursday's spring start against the Athletics.
Gallen made his final Cactus League start a few hours after he was tabbed for the Opening Day assignment by manager Torey Lovullo. The right-hander threw 73 pitches (43 strikes) and told Alex Weiner of Arizona Sports that he was more in sync during this outing than in previous starts. Next up for Gallen is Thursday's regular-season opener against the Cubs.
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Diamondbacks' Zac Gallen: Named Opening Day starter
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Gallen will start Opening Day, March 27 against the Cubs, Steve Gilbert of MLB.com reports.
Many anticipated Corbin Burnes to make his Diamondbacks debut in the first game of the season, but the team will instead give the Opening Day start to Gallen for the third consecutive year. The 29-year-old has made three appearances in the Cactus League this spring, giving up two earned runs while striking out eight batters and walking three over five innings. While Gallen may never return to his 2022 form (2.54 ERA, 0.91 WHIP), he hasn't lost his strikeout stuff and should be able to comfortably reach double-digit wins with Arizona's high-scoring offense behind him.
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Diamondbacks' Zac Gallen: Makes first spring appearance
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Gallen allowed one run on one hit and struck out two over one inning in Monday's spring game against Cleveland.
Gallen threw 15 pitches (nine for strikes), including a changeup that Gabriel Arias sent back over the fence in left-center field. The right-hander told Steve Gilbert of MLB.com that he felt better than his most recent live batting practice session, but the changeup that Arias hammered was "kind of flat." Gallen and Corbin Burnes are considered co-aces -- each has thrown one Cactus League inning -- and manager Torey Lovullo is still deciding which one will start Opening Day.
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Diamondbacks' Zac Gallen: Strikes out 11 in 14th win
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Gallen (14-6) picked up the win over the Giants on Wednesday, allowing one run on two hits and two walks over six innings while striking out 11.
The only run charged to Gallen on the night came across in the second inning after he walked the leadoff man to open the frame before then surrendering an RBI double to Tyler Fitzgerald. The right-hander responded by retiring 14 of the next 15 batters he faced while also posting a season-high 11 strikeouts in the contest. Gallen generated 16 whiffs on the night and it marked the third time this season in which he's recorded double-digit strikeouts. He's now won his last five decisions (spanning seven starts) and carries a 2.67 ERA in September to go along with a 38:11 K:BB. On the downside, Gallen has also issued multiple free passes in nine of his last 10 outings.
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Diamondbacks' Zac Gallen: Carried to win by offense
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Gallen (13-6) picked up the win Friday, giving up four runs on seven hits -- including three home runs -- and a walk over five innings in a 7-4 victory over the Brewers. He struck out five.
The righty blanked Milwaukee for four innings before falling apart in the fifth, blowing a 4-0 lead by serving up long balls to Joey Ortiz, William Contreras and Garrett Mitchell. Arizona struck back for three more runs in the top of the sixth, however, allowing Gallen to escape with the win. It marks Gallen's first time allowing multiple homers since April 26, and he's been both lucky and good down the stretch as the Diamondbacks push for a playoff spot, going 4-0 over his last six outings with a 3.38 ERA, 1.19 WHIP and 43:15 K:BB through 32 innings. He lines up to make his final start of the regular season at home next week against the Giants.
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Diamondbacks' Zac Gallen: Another scoreless start
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Gallen (12-6) earned the win over the Rangers on Tuesday, allowing two hits and two walks while striking out seven over five shutout innings.
Gallen has kept a scoreless stat line in three of his last four outings, with the exception being a five-run outing against the Dodgers. Over that four-start span, Gallen has a 31:12 K:BB across 22 innings. The right-hander is now at a 3.55 ERA, 1.27 WHIP and 133:49 K:BB through 132 innings over 25 starts this season. He'll look to keep things on track in his next start, which is projected to be at Colorado.
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Diamondbacks' Zac Gallen: Yields five runs in loss
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Gallen allowed five runs on six hits and two walks while striking out seven over five innings in a no-decision versus the Dodgers on Friday.
Gallen once again followed a strong start -- a six-inning scoreless outing versus the Red Sox last Saturday -- with a dud, though the Dodgers are a tough opponent for anyone. Over eight starts since the All-Star break, Gallen has allowed 19 runs across 44.1 innings, with 17 of those runs coming in just four of the starts. The right-hander is at a 3.87 ERA, 1.31 WHIP and 118:43 K:BB through 121 innings over 23 starts this year. He's never walked 50 batters in a season, but it appears inevitable he will this year as he's issued multiple walks in seven of his last eight starts. Gallen is projected to make his next start at San Francisco.
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Diamondbacks' Zac Gallen: Removed due to cramps
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Gallen was removed from his start in Saturday's 11-1 win over the Phillies due to general body cramps, but he doesn't expect to miss time, Jesse Friedman of GoPHNX.com reports.
Fantasy managers can breathe a sigh of relief knowing that Gallen didn't sustain an injury Saturday and was merely experiencing cramping. Despite getting ample run support, the 28-year-old fell short of reaching the five frames he needed to qualify for the win, as he covered 4.1 innings and struck out three batters while yielding one run on five hits and two walks prior to departing. Gallen is tentatively scheduled to pitch during a three-game road series against the Rays next weekend.
