Fellows attended
Joliet Catholic Academy in
Joliet, Illinois, and
Vanderbilt University, where he played
college baseball for the
Vanderbilt Commodores,and won the 2019 College World Series in Omaha, NE. He was selected by the
San Diego Padres in the sixth round (173rd overall) of the
2019 Major League Baseball draft. Fellows did not play in 2019 after being diagnosed with
non-hodgkins lymphoma. He did not play in a game in 2020 due to the cancellation of the minor league season because of the
COVID-19 pandemic.
Pittsburgh Pirates On January 19, 2021, Fellows was traded to the
Pittsburgh Pirates in a three team trade that also sent
David Bednar,
Omar Cruz,
Hudson Head, and
Endy Rodríguez to the Pirates,
Joe Musgrove to the Padres, and
Joey Lucchesi to the
New York Mets. He made his professional debut with the rookie-level
Florida Complex League Pirates and Single-A
Bradenton Marauders, but pitched only innings due to an elbow injury. Fellows missed the entirety of the 2022 season while recovering from
Tommy John surgery. Fellows split the 2024 season between the High-A
Greensboro Grasshoppers, Double-A
Altoona Curve, and Triple-A
Indianapolis Indians. In 24 appearances (13 starts) for the three affiliates, he compiled an aggregate 3–6 record and 5.67 ERA with 68 strikeouts across innings pitched. Fellows returned to Indianapolis in 2025, pitching to a 9–6 record and 4.41 ERA with 94 strikeouts in innings pitched across 33 games (19 starts). He elected free agency following the season on November 6, 2025.
New York Yankees On December 12, 2025, Fellows signed a minor league contract with the
New York Yankees. ==Personal life==