Stephen James Nogosek (born January 11, 1995) is an American professional baseball pitcher who is a free agent. He has previously played in Major League Baseball (MLB) for the New York Mets.
Nogosek attended Woodcreek High School in Roseville, California, where he played baseball and football. As a junior for the baseball team in 2012, he pitched to an 8âÂÂ0 record with a 1.02 ERA, striking out 100 batters in innings pitched. After going undrafted out of high school in the 2013 MLB draft, he enrolled at the University of Oregon where he played college baseball for the Oregon Ducks. In 2014, as a freshman, Nogosek made 17 appearances (two starts), going 1âÂÂ1 with a 2.52 ERA and a 1.37 WHIP. As a sophomore in 2015, he appeared in 39 games out of the bullpen in which he compiled a 6âÂÂ3 record with a 2.02 ERA and a 1.24 WHIP. In 2015, he played collegiate summer baseball with the Orleans Firebirds of the Cape Cod Baseball League. In 2016, as a junior, he went 2âÂÂ2 with a 1.11 ERA, a 0.96 WHIP, and 16 saves in 29 relief appearances and was named to the Pac-12 All-Conference Team.
After Nogosek's junior year, he was drafted by the Boston Red Sox in the sixth round of the 2016 MLB draft. Nogosek signed with Boston for $250,000 and made his professional debut with the Lowell Spinners before being promoted to the Greenville Drive. In twenty relief appearances between the two clubs, he went 1âÂÂ2 with a 3.62 ERA. He began 2017 back with Greenville, where he was named a South Atlantic League All-Star, and was promoted to the Salem Red Sox in June.
On July 31, 2017, the Red Sox traded Nogosek, Jamie Callahan, and Gerson Bautista to the New York Mets in exchange for Addison Reed. He was assigned to the St. Lucie Mets and finished the year there. In 69 relief innings pitched between Greenville, Salem, and St. Lucie, he compiled a 5âÂÂ5 record with a 3.52 ERA and 78 strikeouts. Nogosek began 2018 with St. Lucie (where he was named to the Florida State League All-Star Game) and was promoted to the Binghamton Rumble Ponies in June. In 39 total appearances in relief between St. Lucie and Binghamton, Nogosek went 1âÂÂ1 with a 4.99 ERA and a 1.47 WHIP. After the season, he was assigned to the Scottsdale Scorpions of the Arizona Fall League.
He returned to Binghamton to begin 2019 before being promoted to the Syracuse Mets. After going 2âÂÂ0 with a 0.57 ERA in 19 relief appearances between Binghamton and Syracuse, his contract was purchased on June 18 and he was called up to the major leagues. He made his major league debut on June 19 for the Mets against the Atlanta Braves, pitching 2/3 of an inning and giving up two earned runs. On December 16, 2019, the Mets designated Nogosek for assignment.
Nogosek did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic. He was assigned to Triple-A Syracuse to begin the 2021 season. On July 19, 2021, Nogosek was selected to the active roster. He made only one appearance for New York in 2021, spending the remainder of the season in the minor leagues. On November 30, Nogosek was non-tendered by the Mets, making him a free agent.
On January 13, 2022, Nogosek re-signed with the Mets on a minor league contract. On May 8, Nogosek was selected to the 40âÂÂman and active rosters. On October 4, Nogosek recorded his first career win after tossing scoreless innings of relief in the second game of a doubleheader against the Washington Nationals. In 12 appearances out of the bullpen, he posted a 2.45 ERA with 21 strikeouts in 22.0 innings of work.
In 2023, Nogosek pitched in 13 games for New York, registering a 5.61 ERA with 25 strikeouts in innings pitched. On June 9, 2023, he was designated for assignment by the Mets. He cleared waivers and was sent outright to TripleâÂÂA Syracuse on June 13. However, Nogosek declined the outright assignment and elected free agency the following day.
On June 16, 2023, Nogosek signed a minor league contract with the Arizona Diamondbacks organization. In 27 games for the TripleâÂÂA Reno Aces, he struggled to a 6.55 ERA with 32 strikeouts across 33.0 innings of work. Nogosek elected free agency following the season on November 6.
On February 6, 2024, Nogosek signed a minor league contract with the Washington Nationals. In 11 games for the TripleâÂÂA Rochester Red Wings, he struggled to a 9.77 ERA with 15 strikeouts across innings pitched. Nogosek was released by the Nationals organization on May 24.
On May 31, 2024, Nogosek signed with the Lancaster Stormers of the Atlantic League of Professional Baseball. In 33 appearances for Lancaster, he posted a 1âÂÂ1 record and 4.32 ERA with 43 strikeouts and 13 saves across innings of work. Nogosek became a free agent following the season.
On February 1, 2025, Nogosek signed with the Diablos Rojos del México of the Mexican League. In 10 appearances for the team, Nogosek compiled an 0-1 record and 6.00 ERA with 13 strikeouts and three saves across nine innings pitched.
On May 7, 2025, Nogosek signed a minor league contract with the Kansas City Royals. He made 41 appearances (five starts) for the Triple-A Omaha Storm Chasers, compiling a 3-3 record and 4.87 ERA with 60 strikeouts and two saves across innings pitched. Nogosek elected free agency following the season on November 6.
Nogosek spent the 2025âÂÂ26 offseason playing for the Leones del Escogido of the Dominican Professional Baseball League. In March 2026, Nogosek temporarily rejoined the Diablos Rojos del México during the 2026 Baseball Champions League Americas.