Boston Red Sox

Former Red Sox pitcher Corey Kluber announces retirement after 13 seasons

Kluber was the Red Sox’s 2023 Opening Day starter. He started nine games and made six relief appearances for Boston last season.

Corey Kluber won two Cy Young Awards and was a three-time All-Star in his 13 seasons. Matthew J. Lee/Globe Staff
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The Red Sox’s 2023 Opening Day starter is hanging up his cleats.

Corey Kluber, who pitched for 13 seasons across five MLB teams including the Red Sox last year, announced his retirement from baseball on Instagram Friday.

“A special acknowledgment to the Cleveland Guardians, Texas Rangers, New York Yankees, Tampa Bay Rays, and the Boston Red Sox for granting me the privilege of wearing their jerseys and being a part of your teams,” Kluber wrote in a slide on his Instagram post. 

“Each chapter was filled with priceless experiences, phenomenal teammates, and the backing of devoted fans, whose steadfast support always moved me to be the very best I could every time I toed the rubber.”

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In the caption of his post under two images he shared, Kluber said “It was the honor of my life.”

Kluber, 37, spent the 2023 season with the Red Sox. Though his final year as a player was shortened due to right shoulder inflammation, he began the season as Boston’s ace atop the team’s starting rotation.

The right-hander started nine games for the Red Sox before getting demoted to the bullpen in May. Kluber then made six relief appearances, but was ultimately shut down for the remainder of the season following his final MLB outing on June 20. He finished his lone season in Boston with a 3-6 record and 7.04 ERA.

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Prior to joining the Red Sox, Kluber enjoyed a successful baseball career. The pitcher won two Cy Young Awards, earning both as a member of the Guardians in 2014 and 2017. Kluber was MLB’s ERA leader (2.25) and recorded a league-best 0.869 WHIP in his second Cy Young Award-winning season.

As a member of the Yankees in 2021, Kluber tossed a no-hitter versus the Texas Rangers on May 19. He struck out nine batters and allowed just one walk in the feat.

Kluber was also named an All-Star three times in his career, all coming in consecutive seasons (2016-18).

He ends his career with a 116-77 record, a 3.44 ERA, and no shortage of unique hardware.

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