Grady Sizemore (born August 2, 1982) is an American former professional baseball center fielder and coach and former interim manager of the Chicago White Sox.

He returned in 2014 with the Boston Red Sox and played for the Philadelphia Phillies from 2014 to 2015 before finishing 2015 with the Tampa Bay Rays.

In 2024, he joined the coaching staff of the Chicago White Sox, where he was named the interim manager of the team in August of that season following the firing of Pedro Grifol.

[5] He made his major league debut that day against the Chicago White Sox as a defensive replacement in center field.

Although he was supposed to start the season in Triple-A, an injury to Juan González before Opening Day secured Sizemore's spot on Cleveland's roster.

Sizemore also joined Roberto Alomar as the only players in franchise history to record 20 doubles, 10 triples, 20 home runs and 20 stolen bases in the same season.

[13] In addition, he became the second in MLB history to have at least 50 doubles, 10 triples, 25 home runs, and 20 stolen bases in a single season; the first was Chuck Klein in 1932.

In the cover article, Indians' general manager Mark Shapiro calls Sizemore "without a doubt one of the greatest players of our generation".

[7] He was one of six batters in the AL to have at least 20 home runs and 20 stolen bases, along with Alex Rodriguez, Gary Sheffield, Ian Kinsler, B.J.

[20] Sizemore's streak of 382 consecutive games played ended on April 27 due to a sprained ankle sustained the preceding day.

[31] Sizemore initially committed to play for Team USA in the 2009 World Baseball Classic, but backed out of it after injuring his left groin early in spring training.

[32] On April 16, Sizemore hit the first grand slam home run at the new Yankee Stadium off New York reliever Dámaso Marte.

[33] On September 9, after struggling through a subpar season, Sizemore elected to have surgery on his left elbow, which had troubled him since spring training.

[7] After playing in 33 games in 2010 (.211 average, 13 RBI),[7] Sizemore's season prematurely ended after microfracture surgery was performed on his left knee.

In mid-July, Sizemore was again placed on the disabled list following another injury to his right knee; shortly afterwards, he had a second sports hernia surgery, which expected to sideline him until early September.

[38] Through 2011, he had the third-best career fielding percentage of all active major league outfielders (.9935), behind Shane Victorino and Ryan Braun.

[40] After meeting with both the Boston Red Sox and Seattle Mariners during the offseason, Sizemore re-signed with Cleveland, signing a one-year, $5 million contract.

[45][46] On March 28, Sizemore was named the team's starting center fielder for the season opener after beating out Jackie Bradley Jr. in spring training.

[48] He also hit a three-run home run against former teammate CC Sabathia in the game versus the New York Yankees on April 11.

On February 14, 2017, the Indians hired Sizemore as a special advisor to the team's player development department in the front office.

[63] In 2023, Sizemore asked Josh Barfield, his former teammate who was the director of player development for the Arizona Diamondbacks, about joining the organization.