RB Ryan Mathews wore shorts and observed practice on Tuesday night following a late-night auto accident.

Mathews suffered “minor injuries” and was evaluated at a local hospital after he was involved in a two-vehicle accident as he entered east Interstate 8 at Sports Arena Blvd. about midnight 
Monday, according to the San Diego Union-Tribune.

Mathews apparently hit another vehicle after he was driving too fast and lost control of his 2010 BMW, California Highway Patrol Officer Mary Bailey told the U-T. No drugs or alcohol appeared to have been involved.

The players were off Monday, but it's unclear if they were under a team curfew to be at the team's training camp hotel.

Others not participating in practice Tuesday included: CB Marcus Gilchrist, G Johnnie Troutman,  G-T Brandyn Dombrowski (foot, cyst), LT Jared Gaither, OLB Larry English, OT Phil Trautwein, QB Charlie Whitehurst (sore MCL), SS Atari Bigby and WR Eddie Royal

Follow Chargers reporter Dan McLellan on Twitter: @CBSSportsNFLSD and sandiegosports.