In the bottom of the third, Tuesday night vs. the Braves, the Cubs "All Everything" first baseman did not take the field. Todd Walker moved from 2B to 1B and Hairston came in to play 2B. Len and Bren did not give the reason Lee left the game. They speculated that Lee's shoulder was going to keep him out of the All Star HR Derby. Next they showed his last AB where he grimaced swinging at a pitch that was outside.
I hate to imagine the results if the Cubs were to lose Lee for an extended period of time.