Anthony John "A.J." Pierzynski is an American Major League Baseball catcher who has played for the Chicago White Sox since 2005. Pierzynski formerly played with the Minnesota Twins and San Francisco Giants . Pierzynski was also a wrestler for Total Nonstop Action Wrestling.

Pierzynski had the longest streak of consecutive error-less games among active Major League catchers . A.J. made the 2002 American League All-Star Team as a reserve catcher while playing for the Minnesota Twins.