In the ninth inning of Sacto's game at Las Vegas this evening CarGo fouled an inside fastball down the left field foul line. He immediately dropped the bat and the Mgr and Trainer didn't hesitate to take him out of the game.
I'm don't mean to cry wolf b/c there was no report of the injury, but the fact that he immediately came out doesn't sound very good. Something like that often is a 'Pop' of some sort where the athlete immediately knows something is wrong.
Hopefully it is nothing serious and hopefully the A's post a report on their home page tomorrow.