ATLANTA - All-Star second baseman Joe Panik was placed on the disabled list with lower back inflamation Monday, and the Giants called up infielder Kelby Tomlinson. Panik expressed frustration after Sunday’s game because the back issue wasn’t going away. He sat out the final two games of the homestand and played the first two games in Texas before sitting out Sunday. “We tried to battle through it,” Panik said Sunday.