Nate Robertson, who thinks of himself as a starter, will begin the season in the bullpen and believes that his time with the Tigers might be nearing an end. "There's definitely a difference of opinion, because I don't have the job," Robertson said Thursday. "The cycle of a player's time in a certain place comes and goes. This is my seventh year in the organization. "Maybe my time here is nearing its end. And I'm fine with that." Rotation spots were given to Zach Miner and rookie Rick Porcello over Robertson this spring.