Toronto Blue Jays The
Toronto Blue Jays selected Mayza in the 12th round of the
2013 Major League Baseball draft. He received a $100,000
signing bonus and was assigned to the
Rookie-level Gulf Coast League Blue Jays to begin his professional career. After three appearances in the Gulf Coast League, Mayza was promoted to the
Rookie Advanced Bluefield Blue Jays of the
Appalachian League. Mayza made 13 total appearances in 2013 and posted a 1–4 record, 7.76 ERA, and 27 strikeouts in 29 innings pitched. He was assigned to Double-A New Hampshire to begin the 2017 season. After 29 appearances, Mayza was promoted to the
Triple–A Buffalo Bisons. He made 11 relief appearances, posting a 0.93 ERA, before his first promotion to the Majors. On August 14, 2017, Mayza was promoted to the major leagues for the first time. Mayza was credited with his first major league
win on September 12, when he pitched the bottom half of the 9th inning before the Blue Jays walked off the
Baltimore Orioles 3–2. Mayza split the 2018 season between the major leagues and the
Buffalo Bisons. In 37 games for the Blue Jays, he posted a 2–0 record with a 3.28 ERA and 40 strikeouts over 35 innings. On September 13, 2019, in the 10th inning in a game against the
New York Yankees, Mayza threw a pitch behind
Didi Gregorius and immediately crumpled to the ground in pain. The next day, it was revealed he had torn his UCL and would undergo
Tommy John surgery. In 68 relief outings for Toronto in 2019, he compiled a 4.91 ERA with 55 strikeouts across innings of work. Mayza was outrighted off the Blue Jays roster on November 20, 2019. He spent all of 2020 recovering from the surgery. On April 1, 2021, Mayza was selected to the 40-man roster. That year, he recorded a 3.40 ERA and 57 strikeouts across 61 appearances for Toronto. On September 28, 2022, Mayza gave up
Aaron Judge’s 61st home run, tying an American League record. He made 63 total appearances for the Blue Jays in 2022, compiling an 8–1 record and 3.14 ERA with 44 strikeouts across innings pitched. On January 13, 2023, Mayza signed a one-year, $2.1 million contract with the Blue Jays, avoiding salary arbitration. He made 69 appearances for Toronto in 2023, compiling a 1.52 ERA with 53 strikeouts across innings of work. Mayza began the 2024 campaign out of Toronto's
bullpen, and struggled to an 8.03 ERA with 16 strikeouts across innings pitched. On June 29, 2024, Mayza was
designated for assignment by the Blue Jays. He was released by the organization on July 5.
New York Yankees On July 10, 2024, Mayza signed a minor league contract with the
New York Yankees. In 9 games for the Triple–A
Scranton/Wilkes-Barre RailRiders, he posted a 2.16 ERA with 8 strikeouts. On August 16, the Yankees selected Mayza's contract, adding him to their active roster. In 15 appearances for New York, he recorded a 4.00 ERA with 12 strikeouts over 18 innings of work. On November 22, the Yankees non–tendered Mayza, making him a free agent.
Pittsburgh Pirates On February 3, 2025, Mayza signed a one-year, $1.15 million contract with the
Pittsburgh Pirates. On April 23, Mayza was shut down for six weeks after suffering a
lat strain and
teres major injury. He was transferred to the 60-day injured list the following day. In seven appearances for Pittsburgh, Mayza had recorded a 2.89 ERA with eight strikeouts across innings pitched. Mayza was placed on release waivers on August 30.
Philadelphia Phillies On August 31, 2025, Mayza was claimed off waivers by the
Philadelphia Phillies. In eight appearances for Philadelphia, Mayza recorded a 4.91 ERA with seven strikeouts across innings pitched. On January 22, 2026, Mayza re-signed with the Phillies organization on a minor league contract. On March 22, the Phillies signed Mayza to a major league contract. ==Personal life==