Jack Winkler

Jack Tanner Winkler (born November 4, 1998) is an American professional baseball second baseman in the Athletics organization. He has previously played in Major League Baseball (MLB) for the Miami Marlins. He played college baseball for the San Francisco Dons, and was selected by the Oakland Athletics in the 10th round of the 2021 MLB draft. He made his MLB debut with the Marlins in 2025.

Early life Winkler was born on November 4, 1998, in Littleton, Colorado. He attended Chatfield Senior High School and graduated as salutatorian in 2017.

College career Winkler played college baseball for the San Francisco Dons from 2018 to 2021. Throughout his college career, he played as an infielder. In 2019, Winkler played collegiate summer baseball with the Wareham Gatemen of the Cape Cod Baseball League.

Professional career Oakland Athletics Winkler was selected 308th overall by the Oakland Athletics in the 10th round of the 2021 MLB draft. He split his first professional season between the Rookie-level Arizona Complex League Athletics and Single-A Stockton Ports, hitting .191 in 24 total games.

Winkler spent the 2022 season with the High-A Lansing Lugnuts, batting .267/.355/.379 with four home runs, 25 RBI, and four stolen bases across 60 appearances. He began the 2025 season with the Triple-A Jacksonville Jumbo Shrimp. He made 11 appearances for Miami, going 2-for-12 (.167) with one stolen base. On August 4, Winkler was designated for assignment by the Marlins. He cleared waivers and was sent outright to Triple-A Jacksonville on August 6. On September 5, the Marlins selected Winkler's contract, adding him back to their active roster. He went 2-for-4 (.500) in three games for the Marlins to conclude the year. On November 6, Winkler was removed from the 40-man roster and elected free agency.

Houston Astros On February 5, 2026, Winkler signed a minor league contract with the Houston Astros. He made 56 appearances for the Triple-A Sugar Land Space Cowboys, slashing .185/.260/.306 with five home runs, 28 RBI, and four stolen bases. Winkler was released by the Astros organization on June 22.

Athletics On June 30, 2026, Winkler signed a minor league contract with the Athletics.