Kevin Williams walks off after shot to knee

AP

There’s a reason few veterans want to play in second halves of preseason games, and Kevin Williams just showed why.

The Vikings defensive tackle just limped off the field under his own power, after taking a shot to the right knee from 49ers backup guard Joe Looney.

Looney appeared to deliberately go low on Williams, far enough away from the action of a play that it wasn’t necessary.

Williams was checked by trainers, and won’t return to tonight’s game.