Thanks to The Heater, for breaking this one.
Scott Kazmir was scheduled to pitch the first innings of todays first intrasquad game. He went out the the mound, and all of a sudden decided to shut it down.
There's still no word on the official reason, but Kazmir had warmed up in the bullpen as usual prior to the game and sat in the dugout for the first half inning. Kazmir apparently didn't feel right and walked to the clubhouse, as Reyes began to warm up.
I hope this isn't anything serious, we will have more details later.