Kyle Keller

Kyle Robert Keller (born April 28, 1993) is an American professional baseball pitcher in the Boston Red Sox organization. He has previously played in Major League Baseball (MLB) for the Miami Marlins, Los Angeles Angels, and Pittsburgh Pirates, and in Nippon Professional Baseball (NPB) for the Hanshin Tigers and Yomiuri Giants.

Amateur career Keller attended Jesuit High School in New Orleans, Louisiana. He played college baseball for four seasons (2012–2015) at Southeastern Louisiana University in Hammond, Louisiana.

Professional career Miami Marlins The Miami Marlins selected Keller in the 15th round, with the 536th overall selection, of the 2015 Major League Baseball draft. He made his professional debut in 2015 with the Low–A Batavia Muckdogs, the Single–A Greensboro Grasshoppers, and the High–A Jupiter Hammerheads, accumulating a 0–3 record with a 6.26 ERA in 26 innings. In 2019, he opened the season with Jacksonville, and was promoted to New Orleans on April 9. He made his major league debut on August 4, striking out one batter over innings pitched. In 10 appearances during his rookie campaign, Keller logged a 3.38 ERA with 11 strikeouts across innings pitched. Keller was designated for assignment by Miami on December 20, following the signing of Yimi García.

Los Angeles Angels On January 6, 2020, Keller was traded to the Los Angeles Angels in exchange for Jose Estrada. Keller only made two appearances for the Angels in 2020, giving up two runs in innings for a 7.71 ERA with a lone strikeout. On March 31, 2021, Keller was designated for assignment by the Angels.

Pittsburgh Pirates

On April 5, 2021, Keller was traded to the Pittsburgh Pirates in exchange for cash considerations. He made 32 appearances for the Pirates, going 1–1 with a 6.48 ERA and 36 strikeouts. On November 6, Keller was removed from the 40–man roster and sent outright to the Triple–A Indianapolis Indians. He subsequently rejected the assignment and elected free agency the next day.

Hanshin Tigers

On December 11, 2021, Keller signed with the Hanshin Tigers of Nippon Professional Baseball. Keller was mainly used as a relief pitcher during the 2022 season, posting a 3-2 record and 3.31 ERA with 46 strikeouts and three saves across innings pitched.

Keller made 27 appearances for the Tigers in the 2023 campaign, compiling a 1-0 record and 1.71 ERA with 28 strikeouts and one save across innings of work.

Yomiuri Giants On December 26, 2023, Keller signed with the Yomiuri Giants of Nippon Professional Baseball. He made 52 appearances out of the bullpen for Yomiuri in 2024, compiling a 2–2 record and 1.53 ERA with 54 strikeouts across 47 innings pitched.

On December 8, 2024, Keller re–signed with the Giants on a one–year contract. He made 45 appearances for the Giants in 2025, posting a 1-1 record and 3.11 ERA with 49 strikeouts across innings pitched. Keller became a free agent following the season.

Boston Red Sox On February 3, 2026, Keller signed a minor league contract with the Boston Red Sox.