| Trey Nielsen | |
| Position: | Pitcher |
| Birth Date: | 1 September 1991 |
| Birth Place: | Salt Lake City, Utah |
| Bats: | Right |
| Throws: | Right |
| Debutleague: | MLB |
| Statleague: | MLB |
Trey Storm Nielsen (born September 1, 1991) is an American former professional baseball pitcher. He played four seasons in the St. Louis Cardinals organization.
Nielsen attended Skyline High School in Millcreek, Utah. He was drafted by the Chicago Cubs in the 42nd round of the 2010 Major League Baseball Draft, but did not sign and attended the University of Utah. He was drafted by the St. Louis Cardinals in the 30th round of the 2013 MLB Draft.[1]
Nielsen was on Italy's roster for the 2017 World Baseball Classic.[2]