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5/30/2013 9:05 P.M. ET

Throwback jerseys evoke '48 team, Mauer's hometown

MINNEAPOLIS -- The Twins and Brewers both wore throwback jerseys Thursday at Target Field, with the Twins wearing 1948 St. Paul Saints uniforms and the Brewers donning 1948 Milwaukee Brewers uniforms.

Twins catcher Joe Mauer was especially proud to wear the throwback gear, as he is a St. Paul native.

"I wish it was for more than one day," Mauer said. "But it'll be fun."

Mauer was one of several Twins players to help model the St. Paul Saints gear at a press conference May 13. He said his favorite part was that the team jackets said Lexington Park -- the home of the Saints from 1897 to 1956 -- on the back, which is close to where he grew up.

"I grew up on Lexington Parkway just like five minutes from the stadium, so it's pretty cool for me and my family," Mauer said. "I remember my grandpa talking about the ballpark and things like that, so it's pretty special."

The '48 Saints -- a farm team of the Dodgers -- featured future Hall of Famer Roy Campanella, who became the first African American to play in the American Association. The club was also managed by future Hall of Fame manager Walter Alston and had other future Major Leaguers such as Eric "The Red" Tipton and Dan Bankhead, the first African American pitcher in Major League Baseball. Hall of Famers Miller Huggins, Lefty Gomez and Duke Snider also played for the Saints in that era but not for the '48 club.

Hall of Famer and St. Paul native Paul Molitor also took photographs with fans before the game on Target Plaza near the Twins' team store.

One day after exiting DL, Plouffe back on it

MINNEAPOLIS -- Trevor Plouffe is out with another injury.

The Twins placed Plouffe on the 15-day disabled list with a strained left calf Thursday, just one day after he was activated from the seven-day concussion disabled list. Plouffe strained his calf while running before Wednesday's game. First baseman/right fielder Chris Colabello, who was optioned to Triple-A Rochester on Wednesday, was called right back up Thursday to replace Plouffe on the roster.

The move cannot be retroactive to when he sustained his concussion May 22 because it is a different injury and he was officially activated from the concussion DL on Wednesday. So the move is retroactive to Wednesday.

"It's two separate DL stints," Twins general manager Terry Ryan said. "One's a seven-day concussion, the other one's a 15-day. That would be illegal."

"It's different," Twins manager Ron Gardenhire said. "We looked into it three times and tried all the different arguments that he hasn't played, and even yesterday when he was activated he didn't play and hasn't since the concussion. But it doesn't work, because they have a special rule for [concussions]. So it's a bad rule. I think eight more days would be just fine."

The Twins could not afford to wait on Plouffe because of their thin bench with eight relievers on the roster. Plouffe is now eligible to return from the DL on June 13.

Jamey Carroll and Eduardo Escobar will both see action at third base in Plouffe's absence. Carroll made the start at third Thursday against the Brewers.

Mastroianni enters new phase of recovery

MINNEAPOLIS -- Outfielder Darin Mastroianni had his cast removed from his left ankle Wednesday after having ankle surgery May 23 but will still spend the next two weeks in a walking boot.

Mastroianni, who is on the 60-day disabled list retroactive to April 16, had a bone chip repaired in his ankle. He wore a cast for a week and will spend the next two weeks in a walking boot, including one week on crutches, before ramping up his rehab program.

But Mastroianni said he was still not sure when he would return to baseball activities because it was such a freak injury. He hit a foul ball off his ankle in late March and reinjured the ankle while running in early April.

"I don't think any of us really know," Mastroianni said. "We haven't had many guys with the surgery. Even the surgeons weren't sure what to do, because it's rare to break the bone that I did. So we'll play it by ear. But a lot of it will be based on feel. But I feel better, and a lot of the swelling is out of there."

Mastroianni will go on a rehab assignment once he is healthy, and he is still aiming for a return in July, but it depends on how his ankle responds.

"It's still too far ahead," Mastroianni said. "I still can't put any weight on it. So we'll see how it goes. The quicker I can put weight on it without pain, the quicker I can start throwing and hitting and all that stuff."

Rhett Bollinger is a reporter for MLB.com. Read his blog, Bollinger Beat, and follow him on Twitter @RhettBollinger. This story was not subject to the approval of Major League Baseball or its clubs.