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Pierzynski has been with the White Sox since 2005, the year Geovany Soto made his major league debut. Pierzynski had already been in the league for six years prior to joining the White Sox, and has been fairly consistent hitting in the .280 range with approximately 10-12 home runs.
Yes, Pierzynski is a hot head with a temper, apparent by his outburst-turned-brawl with former Cubs catcher Michael Barrett. However, he was the emotional leader of the team and he obviously earned the respect of Ozzie Guillen and Kenny Williams, something not easy to do for someone as high-profile as A.J.
Soto, on the other hand, did not become a full-time player until 2008 and that is when he had his best year. He has not topped 125 games since 2008, his rookie campaign, and his numbers have been far from consistent as well.
Pierzynski is 35 and Soto is 29 on Jan. 20, but both players' job security is certainly in question. The White Sox have a talented prospect in Tyler Flowers who is expected to be a catcher, at least initially. And Pierzynski is only owed $6 million in 2012.
Soto is still under team control but the depth at catcher behind him is weak. Steve Clevenger and Wellington Castillo have people's attention but neither is expected to outplay Soto, and it is possible the Cubs will bring in a backup from outside the organization.
Winner: A.J. Pierzynski, White Sox