National Signing Day is here, bringing college football fans and recruiting buffs together for an explosion of news and excitement that will make-up of the top programs in the sport. Not every player who puts on a hat will be an instant-impact addition to their future school, but the correlation of good recruiting and on-field success over time has proven that this day matters.

While some of the top prospects in the Class of 2017 have already signed and enrolled in school -- like blue chip running backs Najee Harris (Alabama) and Cam Akers (Florida State) -- most have committed verbally with plans to send their pledge in writing on Wednesday. Some prospects are holding out to the last minute, announcing their college intentions in front of friends, family and cameras.

Below you'll find a viewer's guide of the day's top announcements. We will update with streaming links when available. It's the script of expected drama on a day that's guaranteed to produce two or three unexpected stories in college football.

All times Eastern

No. 92 Levi Jones (Austin, Texas) -- four-star OLB
Finalists: Florida State, Florida, Texas A&M, UCLA, USC
Announcement: 8 a.m, ESPNU

No. 246 Stephan Zabie (Austin, Texas) -- four-star OT
Finalists: Texas, Oklahoma, USC
Announcement: 8 a.m. on ESPNU

No. 154 Chaz Ah You (Provo, Utah) -- four-star S
Finalists: BYU, Stanford, UCLA, Utah, Washington
Announcement: 9 a.m.

No. 25 Aubrey Solomon (Leesburg, Ga.) -- five-star DT
Finalists: Michigan, Alabama, Georgia USC
Announcement: 9:45 a.m. on ESPNU

No. 86 Todd Harris (Plaquemine, La.) -- four-star S
Finalists: LSU, Alabama, TCU
Announcement: 10 a.m. on ESPNU

No. 40 Jeff Thomas (East Saint Louis, Ill.) -- four-star WR
Finalists: Miami, Louisville, Oregon
Announcement: 10 a.m. on ESPNU

No. 73 Willie Gay (Starkville, Miss.) -- four-star OLB
Finalists: LSU, Michigan, Mississippi State, Ole Miss
Announcement: 10 a.m.

No. 93 Jarez Parks (Sebastian, Fla.) -- four-star DE
Finalists: Alabama, Auburn, Florida, Florida State, North Carolina
Announcement: 10 a.m.

No. 306 Michael Harley (Fort Lauderdale, Fla.) -- four-star WR
Finalists: Miami, UCLA
Announcement: 10:05 a.m. on

No. 143 Chevin Calloway (Dallas, Texas) -- four-star CB
Finalists: Arkansas, Texas, Ole Miss
Announcement: 11 a.m. on ESPNU

No. 41 Jay Tufele (South Jordan, Utah) -- four-star DT
Finalists: Utah, BYU, Michigan, Ohio State, USC
Announcement: 11:30 a.m.

No. 181 Markaviest Bryant (Cordele, Ga.) -- four-star DE
Finalists: Georgia, Auburn, LSU
Announcement: 11:30 a.m.

No. 37 K'Lavon Chaisson (Houston, Texas) -- four-star DE
Finalists: Texas, LSU
Announcement: 11:35 a.m.

No. 35 Austin Jackson (Phoenix, Ariz.) -- four-star OT
Finalists: USC, Arizona State, Washington
Announcement: 12 p.m.

No. 77 Henry Ruggs III (Montgomery, Ala.) -- four-star WR
Finalists: Alabama, Florida State
Announcement: 12 p.m.

No. 135 Christopher Henderson (Miami, Fla.) -- four-star CB
Finalists: Florida, Miami, Tennessee
Announcement: 12 p.m.

No. 140 Josh Falo (Sacramento, Calif.) -- four-star TE
Finalists: Oregon, USC, Colorado
Announcement: 12 p.m.

Kevaughn Dingle (Opa Locka, Fla.) -- three-star WR
Finalists: South Florida, FIU, Utah
Announcement: 12 p.m. on

Naytron Culpepper -- three-star CB
Finalists: Maryland, Michigan State, South Florida
Announcement: 12 p.m. on

Donelle Thomas -- three-star S
Finalists: Colorado State, Indiana, South Florida
Announcement: 12 p.m. on

No. 26 LaBryan Ray (Madison, Ala.) -- five-star DE
Finalists: Alabama, Florida, Mississippi State, Ole Miss, Tennessee
Announcement: 12:40 p.m.

No. 233 A.J. Davis (Lakeland, Fla.) -- four-star RB
Finalists: Pittsburgh, North Carolina, Louisville
Announcement: 1 p.m. on ESPN2

No. 64 Devonta Smith (Amite, La.) -- four-star WR
Finalists: Alabama, Florida State, LSU, Miami
Announcement: 2 p.m.

No. 136 Nico Collins (Pinson, Ala.) -- four-star WR
Finalists: Michigan, Georgia, Alabama
Announcement: 2:30 p.m.

No. 31 Joseph Lewis (Los Angeles, Calif.) -- five-star WR
Finalists: USC, Nebraska, Oregon
Announcement: 4:10 p.m. on ESPN2

No. 102 Greg Johnson (Los Angeles, Calif.) -- four-star ATH
Finalists: USC, Nebraska, Oregon
Announcement: 4:10 p.m. on ESPN2

No. 6 Marvin Wilson (Bellaire, Texas) -- five-star DT
Finalists: LSU, Florida State, Ohio State, Oklahoma, South Florida
Announcement: 4:30 p.m. on ESPN2