Placido Polanco out 4-6 weeks

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From rotoworld.com

Placido Polanco (shoulder) is now expected to miss 4-6 weeks.
It was initially 3-8 weeks, although 4-6 is basically the same thing. Manager Jim Leyland said Thursday that he's hoping to have Polanco back by the end of the regular season, which is a little over six weeks away.
Source: Detroit News

Omar Infante is going to get most of the starts at second base unless the Tigers make a trade. They've already turned down an offer of Mark Loretta from Boston.

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The Tigers picked up Neifi Perez from the Cubs today.

DETROIT (AP) - The Detroit Tigers acquired Neifi Perez from the Chicago Cubs on Sunday for a minor leaguer, adding infield depth less than a week after losing second baseman Placido Polanco because of a shoulder injury.

Perez played 53 games at second base, making him an option when the Tigers don't play Omar Infante, 21 games at shortstop, giving them a choice when give Carlos Guillen a day off, and 10 more games at third base.

In the trade, the Tigers gave up catcher Chris Robinson. He hit .286 with a homer and 47 RBIs at class-A Lakeland. His contract is expected to be assigned to class-A Daytona by the Cubs.