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09/01/09 9:08 PM ET

Glaus back but role undetermined

Cardinals third baseman set to see first action of '09

ST. LOUIS -- Troy Glaus is back. To do what, exactly, remains a bit unclear.

Glaus has not taken a Major League at-bat in 2009, but that is set to change. He was activated from the disabled list on Tuesday as the Cardinals took advantage of the September roster expansion for the first, but not last, time this year. The club's third baseman in 2008, Glaus is more likely a pinch-hitter for the remainder of the season.

"This is what all the work was about, was trying to get back here and contribute here," Glaus said. "I feel good. I feel ready to go, and we'll see what I can do to help this team win down the stretch."

Late in the offseason, Glaus underwent surgery on his right shoulder. The rehabilitation progress went much slower than he hoped, and then once he began playing in his first Minor League rehab assignment, he came down with back trouble. Now he's been activated and he's hoping to get in some games.

But that's far from a guarantee. Glaus got some work during Kyle Lohse's simulated game on Tuesday afternoon, but the third-base job that was his now belongs to Mark DeRosa.

"It's just a difficult spot," manager Tony La Russa said. "We've gotten to this point, and Khalil [Greene] is having trouble getting playing time, and now Troy. We're just going to go series to series and keep him working and use him whenever. But it's not the easiest spot to walk into."

The Cardinals expect to add several more players, but not immediately. Todd Wellemeyer and Kyle Lohse will be activated from the disabled list in the coming days, and somewhere in between three and five Minor League players will be called up.

However, Triple-A Memphis is in a playoff race, so those players won't come immediately. Among the players who might be added are catcher Matt Pagnozzi, left-handed reliever Royce Ring, outfielder Allen Craig, right-hander P.J. Walters and infielder Tyler Greene.

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