Yennsy Manuel Diaz
- Bats Right, Throws Right
- Height 6' 1", Weight 202 lb.
Pitcher Yennsy Diaz was originally signed by the Toronto Blue Jays as an amateur free agent out of the Dominican Republic on July 3, 2014. He made his professional debut the next year, appearing with two teams, the DSL Blue Jays, for whom he went 3-3, 1.93 in 10 games, and the GCL Blue Jays, where he was 1-1, 4.74 in 5 appearances. Having reached the United States before turning 19, Diaz was immediately considered a serious prospect, but he had a tougher year in 2016 with the Bluefield Blue Jays of the Appalachian League, where he went4-6, 5.79 in 12 games.
In 2017, he pitched in full-season ball for the first time with the Lansing Lugnuts of the Midwest League. He went 5-2, 4.79 in 16 games and struck out 82 batter in 77 innings. he started the 2018 season back at Lansing where he was dominant for a couple of months, going 5-1, 2.08 in 9 starts to earn a promotion to the Dunedin Blue Jays of the Florida State League, where he continued to pitch well. Overall, he was 10-5, 3.05 in 27 games for the season, logging 147 1/3 innings and giving up just 113 hits. He followed that up with another solid season with the New Hampshire Fisher Cats of the AA Eastern League in 2019, where he was 11-9, 3.74 in 26 starts. He should have pitched in AAA in 2020, but the minor league season was wiped out by the Coronavirus pandemic, so he spent the year at the Blue Jays' alternate training site in Rochester, NY. On August 4th, he was called up to the big club to make his major league debut but things did not go great as he walked 4 of the 7 batters he faced in two-thirds of an inning against the Baltimore Orioles and was charged with 2 runs for an ERA of 27.00.