Allen Lorenz "A. J." Pollock (born December 5, 1987) is an American professional baseball center fielder for the Arizona Diamondbacks. The Arizona Diamondbacks selected Pollock in the first round of the 2009 Major League Baseball Draft. [1]Pollock playing for the Reno Aces, triple-A affiliates of the Diamondbacks, in 2012 In 2013 Pollock batted .269 with 8 home runs and 38 RBI over the course of 137 games.