Senzatela winced and walked gingerly off the mound after suffering what the team later said was a lower back strain. Manager Bud Black and team trainers came out to check on him and quickly determined he could go no further.
Senzatela pitched two innings and allowed one hit before having to make the early departure. He walked one and struck out three. He came into the game 2-2 with a 4.88 ERA.
The Associated Press contributed to this report.