Allen Lorenz "A. J." Pollock (born December 5, 1987) is an American professional baseball center fielder for the Arizona Diamondbacks.Pollock playing for the Reno Aces, triple-A affiliates of the Diamondbacks, in 2012
Pollock was called up to the majors for the first time on April 18, 2012 and made his debut that day. Batting as a pinch hitter for Justin Upton, Pollock collected his first career MLB hit, a single, on April 23 against the Phillies. He would play in 31 games that season for the Diamondbacks, batting .247 with 2 home runs and 8 RBI.
In 2013 Pollock batted .269 with 8 home runs and 38 RBI over the course of 137 games.
Pollock missed the second half of the 2014 season with an injury. Up to that point in the season, he was batting .302. In 2015, he was named aNational League All-Star. Pollock was signed to a two-year extension worth $10.25 million on February 8, 2016.