Anthony Misiewicz Bio
Anthony Misiewicz is an American professional baseball pitcher who is currently a free agent. He has previously played in Major League Baseball (MLB) for the Seattle Mariners, Kansas City Royals, Arizona Diamondbacks, Detroit Tigers, New York Yankees, and Minnesota Twins. A left-handed reliever, Misiewicz has spent time with several organizations since making his major league debut in 2020, working primarily as a middle-inning option out of the bullpen.
Born in Michigan and developed through the college ranks, Misiewicz built his professional career by moving steadily through the minor leagues before reaching the majors. His career has included multiple trades, waiver claims, and minor league signings, reflecting the journeyman path many late-round draft picks follow in modern baseball.
Early Life and Background
Anthony Misiewicz was born on November 1, 1994, in New Baltimore, Michigan, United States. He grew up in the New Baltimore area and attended Anchor Bay High School, where he developed his pitching skills before moving on to the college level. His hometown, located north of Detroit along Lake St. Clair, has a long tradition of producing athletes who go on to compete in a variety of sports.
After finishing his high school career, Misiewicz enrolled at Michigan State University, joining the Michigan State Spartans baseball program. He spent three seasons with the Spartans, gradually establishing himself as a dependable starting pitcher in the Big Ten Conference. His development in East Lansing helped prepare him for a professional opportunity once he became eligible for the MLB draft.
Path to Professional Baseball
During his junior year at Michigan State in 2015, Misiewicz posted a 5–4 win–loss record with a 3.80 earned run average over 18 games, including eight starts. That summer, he played collegiate baseball for the Cotuit Kettleers of the Cape Cod Baseball League, gaining exposure against top amateur talent from across the country. His combination of performance and experience drew the attention of MLB scouts.
The Seattle Mariners selected Misiewicz in the 18th round of the 2015 MLB draft. He chose to sign with the organization for a $70,000 signing bonus rather than return to Michigan State for his senior year, beginning his professional career that summer. He made his debut with the Everett AquaSox, going 3–2 with a 2.14 ERA in 46 and one-third innings, a strong start that set the tone for his early development.
Anthony Misiewicz Career
Early Career (2015–2017)
In 2016, Misiewicz pitched for the Bakersfield Blaze, compiling a 7–10 record with a 4.79 ERA across 29 starts as he adjusted to a full professional workload. He began 2017 with the Modesto Nuts before earning a promotion to the Arkansas Travelers. On August 6, 2017, the Mariners traded him, Luis Rengifo, and a player to be named later to the Tampa Bay Rays in exchange for Mike Marjama and Ryan Garton, and he was assigned to the Montgomery Biscuits. Across 28 total starts that season, he went 11–6 with a 4.51 ERA.
On December 13, 2017, the Seattle Mariners reacquired Misiewicz from the Rays for an international signing bonus slot, returning him to the organization that had originally drafted him. In 2018, he pitched for Arkansas, posting a 3–12 record and 5.51 ERA in 21 starts, and he missed nearly a month due to injury. He opened 2019 in Arkansas before moving up to the Tacoma Rainiers, where he went 9–8 with a 4.59 ERA and 125 strikeouts over 131 and one-third innings in 26 games.
Seattle Mariners MLB Debut (2020–2022)
Misiewicz made his major league debut on July 24, 2020, against the Houston Astros, giving up one run in one inning of relief. In the shortened 2020 season, he appeared in relief and posted a 0–2 record with a 4.05 ERA, becoming a regular presence in the Mariners’ bullpen. He continued to work as a left-handed reliever for Seattle over the following seasons, providing the team with matchup options against opposing hitters.
On July 31, 2022, the Mariners designated Misiewicz for assignment as they reshaped their roster. The transaction ended his initial run in Seattle and set up a series of moves that would take him across the league in a short span of time.
Kansas City Royals (2022)
On August 1, 2022, the Kansas City Royals acquired Misiewicz in a trade for cash considerations. He appeared in 15 games for Kansas City down the stretch, going 1–1 with a 4.11 ERA and recording 19 strikeouts in 15 and one-third innings pitched. His time with the Royals ended on February 3, 2023, when the team designated him for assignment following the official signing of veteran pitcher Zack Greinke.
Arizona Diamondbacks (2023)
After a brief stop with the St. Louis Cardinals, Misiewicz was traded to the Arizona Diamondbacks on March 31, 2023, in exchange for cash considerations. He made seven appearances for Arizona, posting a 5.63 ERA with six strikeouts in eight innings. A calf strain caused him to miss about three weeks, and after being activated on June 10, he was designated for assignment on June 12 to make room for Joe Mantiply’s return from the injured list.
Detroit Tigers (2023)
On June 18, 2023, the Detroit Tigers claimed Misiewicz off waivers and optioned him to the Triple-A Toledo Mud Hens. He was recalled to Detroit on June 27 to replace Will Vest, who had been placed on the injured list. After giving up three runs on four hits without recording an out, he was optioned back to Toledo the next day and designated for assignment on June 29. He cleared waivers on July 1 and was sent outright to Toledo.
New York Yankees (2023–2024)
The New York Yankees claimed Misiewicz off waivers on July 6, 2023, and optioned him to the Scranton/Wilkes-Barre RailRiders. He was promoted to the majors on September 10, but on September 15, he was struck in the head by a line drive off the bat of Pittsburgh Pirates infielder Ji-hwan Bae. He was released from the hospital and placed on the injured list, then was non-tendered and became a free agent on November 17.
On December 7, 2023, Misiewicz re-signed with the Yankees on a minor league contract. In 23 games for Scranton, he recorded a 3.23 ERA with 37 strikeouts and four saves across 30 and two-thirds innings. On June 18, 2024, the Yankees selected his contract, but he made only one scoreless appearance before being designated for assignment on September 9. He cleared waivers, was outrighted to Scranton on September 12, and elected free agency on October 31.
Minnesota Twins (2025)
On January 18, 2025, Misiewicz signed a minor league contract with the Minnesota Twins. In 26 appearances for the Triple-A St. Paul Saints, he went 2–2 with a 4.02 ERA, 29 strikeouts, and eight saves across 31 and one-third innings. The Twins selected his contract on July 9, and he appeared in five games for Minnesota, posting a 9.64 ERA with five strikeouts in four and two-thirds innings. On November 6, he was removed from the 40-man roster and sent outright to St. Paul, then rejected the assignment and elected free agency.
Driving Style and Strengths
As a left-handed reliever, Misiewicz has been used primarily in matchup situations against opposing hitters. His minor league track record shows a pitcher who can miss bats, including a 2019 season with the Tacoma Rainiers in which he struck out 125 batters in 131 and one-third innings. His ability to log multiple appearances and fill a variety of bullpen roles has allowed him to remain in professional baseball despite frequent roster movement.
Notable Events and Milestones
Misiewicz’s major league debut on July 24, 2020, against the Houston Astros marked the realization of a career he had built since his 2015 draft selection by the Mariners. The most dramatic moment of his MLB tenure came on September 15, 2023, when he was struck in the head by a line drive while pitching for the Yankees, an injury that led to a hospital visit and a stint on the injured list.
Anthony Misiewicz Career Wins
Through the 2025 season, Anthony Misiewicz has compiled a career major league record of 8–9 with a 4.86 earned run average and 119 strikeouts. His wins have come primarily in relief appearances spread across six organizations, and his journey reflects the challenges facing pitchers who move between teams through trades, waiver claims, and minor league deals.
MLB Highlights
Misiewicz has recorded relief wins with several of his MLB clubs, including the Seattle Mariners during his 2020 debut season and the Kansas City Royals in 2022, where he went 1–1 across 15 appearances. His ability to contribute in middle relief has been a consistent theme across stops in Seattle, Kansas City, Arizona, Detroit, New York, and Minnesota.
Other Wins and Performances
In the minor leagues, Misiewicz posted an 11–6 record across 28 starts in 2017 while moving between Modesto, Arkansas, and Montgomery. He also went 9–8 with the Tacoma Rainiers in 2019, striking out 125 batters in 131 and one-third innings, one of the strongest stretches of his professional career.
Anthony Misiewicz Family
Personal Life
Anthony Misiewicz was raised in the New Baltimore, Michigan area and attended Anchor Bay High School before moving on to Michigan State University. Public details about his family life and personal relationships are limited, and he has generally kept his private life out of the public eye while focusing on his professional baseball career.
2025 Season Performance
Anthony Misiewicz opened the 2025 season with the Minnesota Twins organization on a minor league contract, serving as a dependable late-inning option for the Triple-A St. Paul Saints. Across 26 appearances, he went 2–2 with a 4.02 ERA, recorded 29 strikeouts, and converted eight saves in 31 and one-third innings, demonstrating the strike-throwing ability that has defined his career.
On July 9, the Twins selected Misiewicz’s contract, adding him to the major league roster for the first time in 2025. He appeared in five games for Minnesota but struggled to a 9.64 ERA with five strikeouts across four and two-thirds innings, a difficult stretch that ultimately led to his removal from the 40-man roster on November 6. He rejected an outright assignment to St. Paul and elected free agency, closing the book on his time in the organization.
With the 2025 season complete, Misiewicz enters the offseason as a free agent with major league experience across six organizations. His mix of left-handed relief experience, high strikeout totals in the minors, and familiarity with multiple organizations makes him a candidate to sign a new minor league deal with an MLB club as the 2026 season approaches.
