Rays starter Alex Cobb, who has been out since June 15 with a concussion and leg injury, began a rehab assignment with Class A Charlotte Tuesday. Unfortunately, it lasted just two pitches before he was checked by a trainer and subsequently removed from the game, The Tampa Tribune reports. 

Cobb had been dealing with a blister on his throwing hand and was removed from the game for that reason, the Tampa Bay Times reports. The blister is on his right middle finger, according to the Rays. Cobb said he expects to make his next rehab start.