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10/21/06 12:30 PM ET

Tigers' Series roster unchanged

Casey's improving health reduces need for Shelton

DETROIT -- The Tigers left their postseason roster unchanged for the World Series, ending speculation that they could add 21-year-old Andrew Miller to the bullpen or Chris Shelton to the bench.

The move backs up the expectation manager Jim Leyland has that his everyday first baseman, Sean Casey, should be back in the field no later than Game 3 in St. Louis. Leyland left open the possibility that Casey could start at DH for the first two games before that at Comerica Park.

With that, the Tigers will keep their bench the way it is, with utility infielders Neifi Perez, Ramon Santiago and Omar Infante -- one of whom would start at shortstop if Casey is limited to DH on Saturday and Carlos Guillen shifts over from shortstop to first.

Miller's addition would've been more realistic had the Tigers faced the Mets, whose hitters struggled against left-handed pitchers all year. Though Leyland didn't rule out the move once the Cardinals advanced out of the National League Championship Series, the need was much less against a more balanced St. Louis lineup and its greatest weapon, the right-handed-hitting Albert Pujols.

Instead, the Tigers will stick with two left-handed relievers in Jamie Walker, whose four appearances this postseason trail only closer Todd Jones on the club, and Wilfredo Ledezma.

Miller could have been the first player since the inception of the First-Year Player Draft in 1965 to pitch in the World Series in the same year he was drafted. He also could've been the first player in at least that long to pitch in both the World Series and the College World Series in the same year.

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