DETROIT -- Carlos Guillen is headed back to the Tigers, and heading to second base for the first time since 1999. The Tigers activated Guillen from the 15-day disabled list Friday, paving the way for him to rejoin the starting lineup at second.

Guillen went on the 15-day disabled list April 23 with a pulled left hamstring he suffered while rounding third base. Rookie outfielder Brennan Boesch was called up to take his place and has earned himself an everyday role the way he has hit. That left the Tigers looking to find a role for Guillen, eventually settling on second base.

So while Guillen's five-game rehab assignment at Triple-A Toledo was meant to help him find his timing at the plate after a month off, it was also an orientation at second, a position he hasn't played in the Majors since his first couple seasons in Seattle.

Guillen went 6-for-18 for the Mud Hens, including a three-double performance Tuesday against Syracuse. He played seven innings for the Hens Thursday morning at Buffalo before being pulled.

Guillen's return comes at the expense of another surprising Tigers rookie. Danny Worth was optioned to Triple-A Toledo despite a solid week and a half for his first big-league stint. The 24-year-old Worth went 8-for-24 with three RBIs in eight games and played exemplary defense at second, putting himself on the organization's watch for the future.