Timothy Gerard Mayza (born January 15, 1992) is an American professional baseball pitcher for the Philadelphia Phillies of Major League Baseball (MLB). He has previously played in MLB for the Toronto Blue Jays, New York Yankees, and Pittsburgh Pirates. The Blue Jays selected Mayza in the 12th round of the 2013 MLB draft, and he made his MLB debut in 2017.
Mayza played baseball, basketball, and soccer for Upper Perkiomen High School in Red Hill, Pennsylvania. As a sophomore, he threw a no-hitter. In his final high school season, Mayza pitched to a 5âÂÂ3 winâÂÂloss record, 2.73 earned run average (ERA), and 53 strikeouts in 51 innings pitched. He attended Millersville University of Pennsylvania and played college baseball for the Millersville Marauders. In 2012, he played collegiate summer baseball with the Cotuit Kettleers of the Cape Cod Baseball League. In his final year with Millersville, Mayza posted an 11âÂÂ3 record, 1.55 ERA, and 91 strikeouts in 98 innings.
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 1âÂÂ4 record, 7.76 ERA, and 27 strikeouts in 29 innings pitched. In 2014, he split time between Bluefield and the LowâÂÂA Vancouver Canadians. In 26 innings, Mayza worked to a 2âÂÂ4 record, 6.75 ERA, and 20 strikeouts.
Mayza pitched the entire 2015 season with the SingleâÂÂA Lansing Lugnuts. He made 26 appearances for the Lugnuts, and posted a 3âÂÂ2 record, 3.07 ERA, and 62 strikeouts in 55 innings pitched. Mayza continued to progress through the Blue Jays organization, beginning the 2016 season with the HighâÂÂA Dunedin Blue Jays. In June, he earned a promotion to the DoubleâÂÂA New Hampshire Fisher Cats, where he finished the year. Mayza made a career-high 42 pitching appearances in 2016 and went 3âÂÂ3 with a 2.25 ERA and 65 strikeouts in 64 total innings. On January 19, 2017, Mayza was invited to Major League spring training. He was assigned to Double-A New Hampshire to begin the 2017 season. After 29 appearances, Mayza was promoted to the TripleâÂÂA 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. He made his major league debut on August 15, pitching a scoreless 9th inning in a 6âÂÂ4 loss to the Tampa Bay Rays and recording his first major league strikeout against Peter Bourjos. 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 3âÂÂ2.
Mayza split the 2018 season between the major leagues and the Buffalo Bisons. In 37 games for the Blue Jays, he posted a 2âÂÂ0 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 JudgeâÂÂs 61st home run, tying an American League record. He made 63 total appearances for the Blue Jays in 2022, compiling an 8âÂÂ1 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.
On July 10, 2024, Mayza signed a minor league contract with the New York Yankees. In 9 games for the TripleâÂÂA 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 nonâÂÂtendered Mayza, making him a free agent.
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.
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.
Mayza is the eldest of four children born to Jerry and Marlene Mayza. His father played NCAA Division III basketball for Allentown College, and his sister Deanna played basketball for the University of Hartford.