Dominic Leone is a 30-year-old professional pitcher who went to Norwich Free Academy in Norwich, Connecticut, and was a member of the baseball team. He went to Clemson University and threw for the Clemson Tigers baseball team after being undrafted out of high school.
The Tigers went to Leone as a true freshman in a game in which they were facing playoff elimination; Leone won the game, sending the club to the 2010 College World Series.
He developed his off-speed pitches as a result of an injured shoulder in his sophomore year. He played college summer baseball with the Chatham Anglers of the Cape Cod Baseball League after the 2011 season.
He had a 7–4 win–loss record and a 5.25 earned run average as a junior (ERA). Leone learned to throw a cutter after studying Mariano Rivera footage on YouTube while struggling in his junior year.
Leone signed a minor league agreement with the Cleveland Indians on January 23, 2020. On July 23, the Indians chose his deal. On September 11, the Indians designated Leone for assignment.
At the time of his designation, he had an 8.38 ERA in 9.2 innings pitched in 12 games for the Indians. Leone was out righted to the Indians’ alternative training camp roster on September 13, 2020, after clearing waivers. On October 14, he chose a free agency.