Every team across Major League Baseball is looking to be "strong up the middle." Players at premium positions just tend to have more value.
You want an elite center fielder, an elite shortstop, and an elite catcher. Only a few teams can be so lucky as to have them all.
Catcher is one position in particular that has plagued the Chicago White Sox for many years now. A.J. Pierzynski was a reliable presence behind the plate for eight seasons, but Chicago’s attempts to replace A.J. have been fruitless and almost never gone to plan.