John Klein (baseball)

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John Klein
Minnesota Twins – No. 71
Pitcher
Born: (2002-04-22) April 22, 2002
Brooklyn Park, Minnesota, U.S.
Bats: Right
Throws: Right
MLB debut
May 2, 2026, for the Minnesota Twins
MLB statistics
(through May 30, 2026)
Win-loss record0-1
Earned run average4.15
Strikeouts2
Teams

John Joseph Klein (born April 22, 2002) is an American professional baseball pitcher for the Minnesota Twins of Major League Baseball (MLB). He made his MLB debut in 2026.

Career

Klein attended Osseo High School in Osseo, Minnesota, and played college baseball at Iowa Central Community College. He did not start pitching full-time until college.[1] In 2021 and 2022, he played collegiate summer baseball for the Willmar Stingers of the Northwoods League. He signed with the Twins as an undrafted free agent in 2022.[2]

Klein made his professional debut in 2022 with the Florida Complex League Twins. He pitched 2023 with FCL Twins, Fort Myers Mighty Mussels and Cedar Rapids Kernels and all of 2024 with Cedar Rapids. He started 2025 with the Double-A Wichita Wind Surge before being promoted to the Triple-A St. Paul Saints.[3]

On November 18, 2025, the Twins added Klein to their 40-man roster to protect him from the Rule 5 draft.[4] Klein was optioned to Triple-A St. Paul to begin the 2026 season.[5] On May 2, 2026, Klein was promoted to the major leagues for the first time.[6]

References