Hart's playing time in 2015 will be primarily tied to how well Pedro Alvarez adapts to a new position at first base, the Pittsburgh Tribune-Review reports. Manager Clint Hurdle also expects Hart to see at-bats as a pinch-hitter, through double switches and sparingly as an outfielder. Hart, who has undergone surgery to both knees, understands that he's no longer an everyday player. "I just want to stay healthy," he said. "This is my first year in a while that I'm not a starter coming into spring training. I kind of felt it coming. My body's just not there to play 162 games."