Jack Reinheimer
Out of anyone on this list, Jack Reinheimer certainly had the shortest overall MLB career. He made his debut in 2017 with the Arizona Diamondbacks, where he had once been ranked in their top 30 prospects. However, he managed just five major league plate appearances in Phoenix. At the 2018 trade deadline, the Mets claimed Reinheimer off waivers from the D-Backs, after transferring Yoenis Cespedes to the 60-Day disabled list.
Reinheimer spent a couple of weeks in Triple-A Las Vegas with the Mets before they recalled him on August 13, optioning infielder Luis Guillorme back down to the minors in return. He was soon sent back down to Triple-A but saw more big-league action when the Mets called him back up September 1, along with Dominic Smith and Drew Gagnon.
In 30 plate appearances in Flushing, Reinheimer tallied five hits, five walks, and four runs scored. Perhaps his most prominent moment as a Met was when he came in as a pinch-runner on September 29, after Brandon Nimmo left the game with a hamstring injury. Reinheimer’s appearance was clearly overshadowed by the fact that this was also David Wright’s last game, and all eyes were on the Captain that day. However, Reinheimer did have the distinction of being on base in the 13th inning when Austin Jackson walked off the game with a double.
After the 2018 season, Reinheimer was not re-signed by the Mets, and the Chicago Cubs claimed him off waivers on November 2. He was subsequently claimed off waivers by the Texas Rangers and the Baltimore Orioles, all that same offseason. After spending the 2019 season in the minor leagues, Reinheimer was invited to 2020 spring training with the Minnesota Twins, hoping to make it back to the big show before sports shut down indefinitely.