John Patrick Reinheimer
- Bats Right, Throws Right
- Height 6' 1", Weight 186 lb.
- School East Carolina University
- High School Ardrey Kell High School
- Debut August 1, 2017
Infielder Jack Reinheimer was first drafted out of high school by the Atlanta Braves in the 31st round of the 2010 amateur draft; he did not sign and attended East Carolina University instead. He was drafted a second time by the Seattle Mariners in the 5th round of the 2013 draft and inked a contract that time. The Mariners scout was Devitt Moore.
He began his professional career in 2013 with the Everett AquaSox of the Northwest League, hitting .269/.359/.325 in 66 games as the team's starting shortstop. He scored 39 runs, drove in 30, and committed just 5 errors in 57 games at shortstop in what was a promising first season,. In 2014, he played the bulk of the season with the Clinton LumberKings of the Midwest League before earning a promotion to the High Desert Mavericks of the California League at the beginning of August. He hit a combined .276/.338/.355 in 130 games, scoring 84 runs and stealing 39 bases in 50 attempts. His batting line was boosted by a .341 average in the hitter-friendly context of High Desert, but it was still another quite solid season.
Reinheimer began 2015 in AA with the Jackson (TN) Generals, continuing his rapid progression up the minor league ladder. After 48 games, he was hitting .277 with 25 runs scored and 12 stolen bases in13 attempts when on June 3rd, he was included in a big traded that sent him to the Arizona Diamondbacks. In the transaction, Seattle obtained OF Mark Trumbo and P Vidal Nuno in return for C Welington Castillo, P Dominic Leone, Reinheimer and fellow prospect Gabby Guerrero.
Jack made his debut with the Diamondbacks on August 1, 2017 after the team had suffered a rash of injuries to its middle infielders. Nick Ahmed was out since June, and Chris Owings had joined him on the disabled list at the end of July. Ketel Marte then had to leave the team following the sudden death of his mother, leaving Arizona crucially short at the position. They called up Reinheimer and also made a trade for veteran utility infielder Adam Rosales to fill out the ranks, and both made their first appearance for the team on the same day. In Jack's case, he came in as a pinch-hitter for P Patrick Corbin in the 4th and struck out against Jon Lester of the Chicago Cubs in a 16-4 loss.