Date of Birth: 06/20/1992
Height: 6' 3" Weight: 215 lbs
College Experience: St. John's University
Resides: Coram, NY
The 2019 season mark's Horstman's 7th season in professional baseball.
Horstman was drafted by the Seattle Mariners in the 4th round of the 2013 MLB Draft from St. John’s University. Horstman appeared in 35 games for the X’s last season, owning a 3.06 ERA. In 32.1 innings pitched, the southpaw allowed only 26 hits while racking up 47 strikeouts. Horstman had an impressive stretch of 14 consecutive appearances, spanning from June 23rd-July 29th, in which he did not allow a run and surrendered just 5 hits during the span.
Horstman spent his first 5 professional seasons in the Seattle Mariners organization. The Coram, NY native has dealt with injuries throughout most of his career which limited him to just 16 games and 21.1 innings pitched in his first 3 professional seasons. Despite that, Horstman was selected to pitch for the Peoria Javelinas in the prestigious Arizona Fall League in 2015 where the lefty impressed, owning a miniscule 0.93 ERA in 9 games. For his efforts, Horstman spent the majority of the following two seasons at the Double-A level before being released by the Mariners in 2017.