Pierzynski, 34, is having a very good year for the White Sox, hitting .296/.338/.412 while leading all American League catchers in games (105) and innings caught (862 1/3). Pierzynski was hit by Kansas City's Bruce Chen on Friday and hadn't played since. The move is retroactive to Saturday. It his first career stint on the DL.
The team promoted Donny Lucy from Triple-A Charlotte, but he will hardly be able to help replace Pierzynski offensively. Lucy, 29, is hitting .158/.233/.256 in 40 games for the Knights. He's been up to the big leagues twice before, in 2007 and 2010.
Tyler Flowers will presumably take over the catching duties. The 25-year-old is in the lineup Tuesday and enters the game hitting .300/.391/.450 in eight games.
Backup Ramon Castro suffered a fractured right hand and index finger on July 9, but only had his cast and pins removed a week ago.For more baseball news, rumors and analysis, follow @eyeonbaseball on Twitter or subscribe to the RSS feed.