SAN DIEGO -- A dangerous first inning for first basemen claimed the Brewers' Mat Gamel, who exited Tuesday's game at Petco Park with a worrisome right knee injury. Gamel was hurt chasing a popup in foul ground and initially stayed in the game, but he left after taking an awkward swing in the on-deck circle in the top of the second inning. Manager Ron Roenicke expressed concern after the Brewers' 2-0 loss to the Padres, speaking to reporters at the same time Gamel was being further examined. Asked whether he feared the injury was significant, Roenicke said, "Yeah, I think so. I felt pretty good when he stayed in the game. He seemed to be strong. Any time a guy walks off after trying to swing, you're going to be concerned about him. With the knee, there's so many things that you can tweak. Whether it's a slight tear or whatever the case may be, there's a lot going on."
Gamel was chasing a Nick Hundley popup when he smacked into the low wall that separates fans from the playing field. Gamel finished the inning after receiving attention from head athletic trainer Dan Wright and briefly stepped into the on-deck circle in the top of the second inning. But Gamel took an awkward warm-up swing and returned to the dugout. Travis Ishikawa replaced him in the game. The Padres' first baseman, Yonder Alonso, had a run-in with the same portion of the wall during the first inning. He chased a Rickie Weeks popup that made it to the seats, tumbled over the wall and stayed down for several moments. Alonso remained in the game. It's been a painful week for Gamel, who sat out three games last week and over the weekend with of a sore shoulder, the result of a home plate collision with Astros catcher Jason Castro on April 23.