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04/27/09 8:53 PM ET

Guillen nursing sore Achilles tendon

Tigers slugger has been used as designated hitter recently

DETROIT -- Carlos Guillen admits his right Achilles tendon still bothers him. Two and a half weeks after the Tigers left the artificial surface of Toronto's Rogers Centre, it hasn't gotten much better. For now, playing as the designated hitter is helping him to get through.

Guillen was back at DH for Monday's opener against the Yankees, with Ryan Raburn starting in left field and batting eighth against left-hander CC Sabathia. Guillen has been the DH for four of the past five games since he was noticeably hobbling against the Angels on Wednesday. The one game since then when he wasn't the DH, he was out of the lineup altogether.

As of now, it appears unlikely that the injury will force Guillen to the disabled list. Given the versatility on Detroit's bench, manager Jim Leyland can still mix and match his lineup to some extent without having to hold out anybody, such as using Raburn and Josh Anderson in left.

But Leyland admits that having Guillen at DH so regularly is hampering him from rotating guys in and out of the slot and giving others some rest from the field.

"It gets better when it rests," Leyland said of Guillen's Achilles tendon, "but I need him to play. But I'm not going to force it, and I want to make sure he gets right.

"He's one of our most valuable players, obviously. Also, there's the hope that it gets well so I can play him in the outfield. I don't want to monopolize the DH spot with just one guy."

Guillen said the discomfort is on and off, usually occurring when he runs and not when he's batting.

"Sometimes it feels good, sometimes it doesn't," Guillen said.

In other injury news, catcher Matt Treanor said Monday that he'll have hip surgery late this week. Dr. Bryan Kelly, who performed hip surgery on Phillies second baseman Chase Utley after last season, will operate on Treanor at his practice in New York.

Jason Beck is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.