John Lackey Gives Pat Neshek Babet Ruth-Signed Ball For No.41; Cardinals Alter Rotation So Adam Wainwright Faces Pirates, Brewers; Jhonny Peralta Sets Sights On 20-Homer Season; Worth Noting

Number swapping has long fostered a bartering system inside Major League clubhouses, where the veteran who arrives seeking to snag his longtime jersey number offers some reward to the player who is asked to give it up.

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