As expected, right-hander Matt Cain went on the 15-day disabled list Tuesday, retroactive to April 4, with a strained flexor tendon in his throwing arm. After Tuesday's 7-6 loss to the D-backs, Giants manager Bruce Bochy revealed that right-hander Jake Peavy, who was scheduled to start the game but was scratched with lower back pain, continued to feel discomfort after a bullpen throwing session.