SAN FRANCISCO, Calif. - The Miami Marlins announced on Thursday that the franchise has selected the contract of Jack Winkler, a former infielder for San Francisco from 2018-2021, from the Jacksonville Jumbo Shrimp (AAA).

With this transaction, Winkler made his Major League Baseball (MLB) debut on Friday, May 31 against the San Francisco Giants at LoanDepot Park in Miami, Fla.

So far this season, Winkler was slashing .275/.331/.754 with five home runs, 19 RBI, 15 stolen bases, and 21 runs scored across 142 at bats with Jacksonville. On December 11, 2024, the Marlins selected Winkler in the minor league phase of the 2024 Rule 5 draft. He then began the 2025 season with Jacksonville.

Winkler was originally drafted by the Oakland Athletics in the 10^th round (308^th overall) of the 2021 MLB Draft. He split his first professional season between the rookie-level Arizona Complex League (ACL) Athletics and Single-A Stockton Ports. In 2022, Winkler was promoted to High-A Lansing, where he slashed .267/.355/.379 with four home runs, 25 RBI, and four stolen bases across 60 appearances for the Lugnuts.

One year later, Winkler spent the season split between Lansing and the Double-A Midland Rockhounds. In 117 appearances in 2023, he slashed .245/.331/.359 with seven home runs, 58 RBI, and 22 stolen bases across the two affiliates. Winkler returned to Midland for the 2024 season, where he made 127 appearances while hitting .223/.310/.345 with eight home runs, 57 RBI, and 28 stolen bases.

On the Hilltop, Winkler started in 180 of the 184 games he appeared in for the green and gold as he finished his career slashing .276/.366/.406 with 14 home runs, 104 RBI and 39 stolen bases. Winkler capped off his time in San Francisco by putting up career-bests in 2021: batting average (.307), home runs (7), RBI (39), slugging percentage (.505), on base percentage (.382) base on balls (22), sacrifice flies (7), and stolen bases (23). Notably, Winkler was named an All-WCC First Team selection for these efforts in 2021. Prior to this honor, he was also selected as an All-WCC Honorable Mention in 2019 as well as being named to the Preseason All-WCC Team in 2020.

For updates and more information on the San Francisco baseball program, be sure to follow @SFDonsBaseball on Twitter, @USFDonsBaseball on Instagram and @University.of.San.Francisco.Baseball on Facebook.