Anthony Misiewicz Bio
Anthony Misiewicz is an American professional baseball pitcher who is currently a free agent. Born on November 1, 1994, in New Baltimore, Michigan, he has spent several seasons in Major League Baseball (MLB) after working his way up through the minor leagues. Over the course of his career, Misiewicz has appeared for the Seattle Mariners, Kansas City Royals, Arizona Diamondbacks, Detroit Tigers, New York Yankees, and Minnesota Twins. A left-handed pitcher, he is known for his work in relief roles and his willingness to move between organizations in search of opportunity.
Misiewicz first reached the major leagues in 2020 with the Mariners, the team that originally drafted him out of college. Since then, he has become a familiar name among fans who follow baseball’s waiver wire and bullpen movements. His journeyman path through professional baseball has included stints in both starting and relief roles at various minor league levels.
Early Life and Background
Anthony Misiewicz was born and raised in New Baltimore, Michigan, a small city located along the Lake St. Clair waterfront. He grew up in a region with a strong high school baseball tradition, and he attended Anchor Bay High School, where he developed his skills as a pitcher. The Anchor Bay area, part of Macomb County, has produced several athletes who went on to compete at higher levels of the sport.
After completing his high school career, Misiewicz chose to play college baseball at Michigan State University, joining the Michigan State Spartans program. The Spartans compete in the Big Ten Conference, one of the most competitive college baseball leagues in the country. Spending three years in the program allowed Misiewicz to refine his pitching mechanics and build the physical strength needed for a professional career.
During his junior season in 2015, Misiewicz posted a 5–4 win–loss record with a 3.80 earned run average (ERA) across 18 appearances, including eight starts. Following the college season, he played collegiate summer baseball with the Cotuit Kettleers of the Cape Cod Baseball League, one of the premier wooden-bat summer leagues for amateur players in the United States.
Path to Baseball
Misiewicz’s path to professional baseball began in earnest during the 2015 MLB Draft. The Seattle Mariners selected him in the 18th round, recognizing his potential as a left-handed pitcher. Rather than return to Michigan State for his senior year, he signed with the Mariners for a $70,000 signing bonus and began his professional career.
His first professional assignment came with the Everett AquaSox, Seattle’s short-season affiliate. Misiewicz performed well in that introduction, going 3–2 with a 2.14 ERA in 46 and one-third innings pitched. The following year, he advanced to the Bakersfield Blaze and took on a full-season workload, finishing with a 7–10 record and a 4.79 ERA in 29 starts. In 2017, he began the year with the Modesto Nuts before earning a promotion to the Arkansas Travelers.
On August 6, 2017, the Mariners traded Misiewicz, along with Luis Rengifo and a player to be named later, to the Tampa Bay Rays in exchange for Mike Marjama and Ryan Garton. He was assigned to the Montgomery Biscuits and, in 28 total starts between Modesto, Arkansas, and Montgomery, posted an 11–6 record with a 4.51 ERA.
Anthony Misiewicz Career
Early Career (2015–2017)
Misiewicz’s early professional years were defined by steady development across multiple levels of the Mariners’ farm system. After a strong debut with Everett in 2015, he was challenged with a full-season role at Bakersfield in 2016, where the increased innings load tested his endurance and consistency. The experience of starting 29 games helped him adjust to the grind of a professional pitching schedule.
The 2017 season was a transitional year. He opened with Modesto before earning a promotion to Arkansas, demonstrating that he could handle advanced competition. His midseason trade to Tampa Bay added another layer to his development, as he joined a new organization and finished the year with Montgomery. Across 28 total starts that season, his 11–6 record and 4.51 ERA showed he was a reliable arm in any rotation he joined.
Seattle Mariners Return and MLB Debut (2017–2020)
On December 13, 2017, the Seattle Mariners reacquired Misiewicz from the Rays in exchange for an international signing bonus slot. He returned to the Travelers in 2018, where he posted a 3–12 record and a 5.51 ERA in 21 starts. He missed nearly a month of the season due to injury, which interrupted his momentum.
In 2019, Misiewicz began the year with Arkansas before being promoted to the Tacoma Rainiers, Seattle’s Triple-A affiliate. Over 26 games and 24 starts, he went 9–8 with a 4.59 ERA, striking out 125 batters in 131 and one-third innings. That performance earned him a look at the major league level.
On July 24, 2020, Misiewicz made his major league debut against the Houston Astros, giving up one run in one inning of relief. He finished his rookie season with a 0–2 record and a 4.05 ERA, primarily working out of the Mariners’ bullpen.
Kansas City Royals (2022)
On August 1, 2022, the Mariners traded Misiewicz to the Kansas City Royals for cash considerations. He appeared in 15 games for the Royals down the stretch, logging a 1–1 record and a 4.11 ERA with 19 strikeouts in 15 and one-third innings pitched. On February 3, 2023, he was designated for assignment by Kansas City following the official signing of pitcher Zack Greinke.
Arizona Diamondbacks (2023)
On March 31, 2023, Misiewicz was traded to the Arizona Diamondbacks in exchange for cash considerations. He made seven appearances for Arizona, recording a 5.63 ERA with six strikeouts in eight innings pitched. He later missed three weeks with a calf strain and was optioned to the Triple-A Reno Aces on June 10. Two days later, he was designated for assignment after Joe Mantiply was activated 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 on June 27 to replace Will Vest, who had been placed on the injured list. After giving up three runs on four hits while recording only one out, he was optioned back to Toledo the next day and designated for assignment on June 29. He cleared waivers and was sent outright to Toledo on July 1.
New York Yankees (2023–2024)
On July 6, 2023, the New York Yankees claimed Misiewicz off waivers and optioned him to the Triple-A Scranton/Wilkes-Barre RailRiders. He was promoted to the major leagues on September 10, and on September 15, he was struck in the head by a line drive off the bat of Pittsburgh Pirates infielder Ji-hwan Bae. After being released from the hospital, he was placed on the injured list. Misiewicz was non-tendered and became a free agent on November 17.
He re-signed with the Yankees on a minor league contract on December 7, 2023. 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, his contract was selected, adding him to the active roster. He made one scoreless appearance before being designated for assignment on September 9, clearing waivers on September 12, and electing 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 posted a 2–2 record and a 4.02 ERA with 29 strikeouts and eight saves across 31 and one-third innings. On July 9, the Twins selected his contract, adding him to the active roster. In five appearances for Minnesota, he posted a 9.64 ERA with five strikeouts across four and two-thirds innings. On November 6, he was removed from the 40-man roster and sent outright to St. Paul, subsequently rejecting the assignment and electing free agency.
Notable Events and Milestones
One of the most dramatic moments of Misiewicz’s career came on September 15, 2023, when he was struck in the head by a line drive during a game against the Pittsburgh Pirates. The frightening incident resulted in a hospital stay and an injured list placement, but he returned to professional baseball the following season. His major league debut in 2020 with his original drafting team, the Seattle Mariners, also stands as a key career milestone.
Anthony Misiewicz Career Wins
Misiewicz’s career has been built primarily as a relief pitcher, and his wins have been distributed across several major league organizations. He has not accumulated the high win totals of a starting pitcher, but his journeyman path through the Mariners, Royals, Diamondbacks, Tigers, Yankees, and Twins showcases his durability and adaptability as a left-handed arm.
Major League Highlights
In the major leagues, Misiewicz earned his first MLB win during his time with the Kansas City Royals in 2022, finishing his stretch there with a 1–1 record. His bullpen work with the Mariners in 2020 also included a 4.05 ERA across his rookie appearances, establishing him as a viable relief option at the highest level.
Minor League Accomplishments
Misiewicz’s most successful stretch came during the 2017 season, when he went 11–6 across 28 starts with three different affiliates. In 2019, he struck out 125 batters in 131 and one-third innings with the Tacoma Rainiers, demonstrating his swing-and-miss ability at the Triple-A level.
Anthony Misiewicz Family
Personal Life
Anthony Misiewicz was raised in New Baltimore, Michigan, and attended Anchor Bay High School. He later attended Michigan State University, where he continued his baseball career. Details about his personal relationships, marital status, and children are not publicly verified at this time.
2025 Season Performance
The 2025 season marked another chapter in Misiewicz’s journeyman career. After signing a minor league deal with the Minnesota Twins in January, he spent the early part of the year with the Triple-A St. Paul Saints, where he developed into a reliable late-inning option, recording eight saves in 26 appearances.
His strong minor league performance led to his contract being selected by the Twins on July 9, bringing him back to the major leagues. However, his time in the Twins’ bullpen was brief and difficult, as he posted a 9.64 ERA across five appearances before being removed from the 40-man roster in November and electing free agency.
Misiewicz’s 2025 campaign reflected both the promise and the volatility of a career spent moving between organizations. His ability to post strong numbers in the minors continued, even as the major league results did not follow. As he enters free agency once again, his experience and left-handed profile make him a candidate for future minor league opportunities across MLB.