Raiders rookie offensive tackle Kolton Miller played through a Grade II MCL sprain in Sunday’s loss to the Chargers, according to the Las Vegas Review-Journal’s Michael Gehlken. Miller had his worst day as a professional, yielding two sacks and multiple pressures.

“I think [the injury] was similar to KO’s,” Miller said per the Mercury News’ Matt Schneidman. Starting guard Kelechi Osemele is injured as well and didn’t travel to the game. “But again that’s not really an excuse.”

Miller showed toughness in playing Sunday, but if the injury is near the severity of Osemele’s, he ideally shouldn’t be starting. The Raiders’ backup offensive tackle situation isn’t good, however. The team signed OT Ian Silberman in the days leading up to the Chargers game, but he wasn’t on the active roster.

Chalk it up to a learning experience for Miller and for Raiders fans. Miller learned what it’s like to play injured in the NFL, and his fans found out he’s willing to do so.

But Miller’s injury will recover most rapidly with rest — a grade II sprain can take two weeks to heal. The team may want to further shore up its backup offensive tackle spot so Miller can sit some plays out if needed.