Matt Cain struggled in his 2012 debut against the Diamondbacks Sunday, allowing five runs on six hits, two walks and two homers in six innings of San Francisco's loss. Cain was mostly rolling along until the sixth, where he walked Miguel Montero before surrendering back-to-back home runs to Ryan Roberts and Lyle Overbay. A bad day, but of little concern for one of the game's most consistent righties. He should bounce-back at home next weekend where he'll take on the Pirates.