Nunez attended Miami Springs Senior High School in Miami Springs, Florida. He was selected by the San Diego Padres in the 29th round of the 2019 Major League Baseball draft as an infielder. He signed with the Padres and made his professional debut that year with the Arizona League Padres. After he was released by the Padres in August 2021, he was ruled eligible to play Division II college baseball at the University of Tampa.[1] In 2022, he played collegiate summer baseball with the Chatham Anglers of the Cape Cod Baseball League.[2] After playing the infield for two years at Tampa, Nunez was also a pitcher his final season in 2024, becoming a two-way player.[3]
Nunez signed with the New York Mets as an undrafted free agent in June 2024.[4] He spent his first season with the Florida Complex League Mets and St. Lucie Mets. He started 2025 with the Brooklyn Cyclones before being promoted to the Binghamton Rumble Ponies.
On July 31, 2025, the Mets traded Nunez, Raimon Gómez, and Chandler Marsh to the Baltimore Orioles in exchange for center fielder Cedric Mullins.[5] He made one scoreless appearance for the Double-A Chesapeake Baysox before being promoted to the Triple-A Norfolk Tides, for whom he logged a 1-4 record and 3.45 ERA with 21 strikeouts and four saves across 16 games. On November 6, the Orioles added Nunez to their 40-man roster to prevent him from reaching minor league free agency.[6]
Nunez was initially optioned to Triple-A Norfolk to begin the 2026 season.[7] However, on March 25, 2026, it was announced that Nunez had made the team's Opening Day roster.[8] On March 28, 2026 he made his MLB debut in a game against the Minnesota Twins, pitching two innings in relief without giving up a hit or a run, and striking out three.[9]
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