He played in Major League Baseball (MLB) for the Arizona Diamondbacks, Los Angeles Dodgers, Chicago White Sox, Seattle Mariners, and San Francisco Giants.

[1] His family lived an hour and forty minutes away from Foxboro, Massachusetts, and Pollock and his father would routinely make the trip to watch New England Patriots' home games.

[2] Pollock attended RHAM High School in his hometown of Hebron, where he played basketball, soccer, and baseball.

[5] Pollock was rated by Baseball America before his sophomore season as the league's second-best 2009 MLB prospect and best pure hitter.

[13] Batting as a pinch hitter for Justin Upton, Pollock collected his first career MLB hit, a single, on April 23 against the Phillies.

[16] He ended the season batting .315(3rd in the NL)/.367/.498 in 609 at bats with 22 runs (2nd in the NL), 39 doubles (3rd), 6 triples (6th), 20 home runs, 76 RBIs, 39 stolen bases (3rd), an 84.78% stolen base success rate (6th), and 8 sacrifice flies (2nd), playing 151 games in center field.

[20] Pollock broke his right elbow again at the end of spring training, this time on a slide at home plate, and missed most of the 2016 season.

[19] In 2018, Pollock hit .257/.316/.484 in 413 at bats with 21 home runs, 65 RBIs and 7 sacrifice flies (9th in the NL) over 113 games, playing center field.

[14] On January 26, 2019, the Los Angeles Dodgers announced that they had signed Pollock to a four-year contract, with a player option for another year.

On September 16, Pollock hit his 100th career home run, off of Adrián Morejón of the San Diego Padres.

[14] On May 2, 2021, against the Milwaukee Brewers, Pollock hit two home runs (including a grand slam) and drove in a career high eight RBI.

[29] Prior to the trade, Pollock appeared in 49 games for Seattle, batting .173/.225/.323 (all career lows), with 5 homers and 15 RBIs.

On July 31, 2023, Pollock and Mark Mathias were traded to the San Francisco Giants in exchange for cash considerations or a player to be named later.

[32] Pollock played for the United States national baseball team at the 2011 Pan American Games.

[33] On March 8, 2024, it was announced that Pollock had joined the Seattle Mariners during spring training as a volunteer assistant coach.