LAS VEGAS – Spencer Burford was the last 49ers player Saturday to leave their Allegiant Stadium locker room, and there was one last question to be asked.

“It’s two years ago, bro,” Burford said of the 49ers’ Super Bowl loss here. “It’s a bittersweet feeling, because you’re playing the same game in the same stadium. It brings back happy and sad memories. But it’s part of the game.”

Burford, indeed, has no time to dwell on a blocking gaffe in overtime of that loss to Kansas City. It came with him as a substitute right guard. Ironically, that position is suddenly a concern for this coming season’s 49ers team.

Dominick Puni sustained a knee injury on the first series of Saturday’s game and could need a few weeks to recover from a posterior cruciate ligament issue, as initially diagnosed.

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