Robertson's last Major League action came back in 2010 when he spent most of the season with the Marlins and also pitched one ill-fated inning for the Phillies. He was a staple in the Tigers' rotation from 2004-07, starting 126 games and totaling 779 2/3 innings of work.
In 1,152 1/3 career innings, Robertson has a 5.01 ERA, 6.1 K/9 and 3.3 BB/9. We heard earlier this month that he was looking for a Minor League contract with a chance to come to a big league camp and compete for a bullpen spot. Crasnick adds in a second tweet that Robertson will do just that.