William A. Stewart (born July 14, 1997) is an American professional baseball pitcher who is a free agent.
Stewart attended Hazel Green High School in Hazel Green, Alabama. The Philadelphia Phillies selected Stewart in the 20th round, with the 694th overall selection, of the 2015 Major League Baseball draft. He signed with the Phillies, forgoing his commitment to play college baseball at Wallace State Community College.
After signing, Stewart was assigned to the Gulf Coast League Phillies where he went 1âÂÂ0 with a 4.79 ERA over relief innings pitched. He returned to the GCL in 2016, pitching to a 2âÂÂ3 record and 4.06 ERA in 11 games (seven starts), and in 2017, he played with the Williamsport Crosscutters of the LowâÂÂA New York-Penn League where he posted a 4âÂÂ2 record with a 4.18 ERA in 13 starts. In 2018, he pitched for the Lakewood BlueClaws of the SingleâÂÂA South Atlantic League, where he was named a South Atlantic League All-Star. In twenty starts for the season, he pitched to an 8âÂÂ1 record with a 2.06 ERA and a 0.98 WHIP.
On February 7, 2019, the Phillies traded Stewart, Jorge Alfaro, Sixto Sanchez, and $250,000 of international signing bonus pool money to the Miami Marlins for J. T. Realmuto. He spent the 2019 season with the Jupiter Hammerheads of the HighâÂÂA Florida State League, going 6âÂÂ12 with a 5.43 ERA over 23 games (21 starts). He did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic. Stewart spent the 2021 season with the DoubleâÂÂA Pensacola Blue Wahoos, going 5âÂÂ8 with a 4.33 ERA and 85 strikeouts over innings.
In 2022, Stewart played for Pensacola and the TripleâÂÂA Jacksonville Jumbo Shrimp, logging a combined 7âÂÂ6 record and 5.27 ERA with 83 strikeouts in innings pitched. He split the 2023 season between Jacksonville, Pensacola, and the HighâÂÂA Beloit Snappers. In 21 combined relief outings, Stewart accumulated a 3.15 ERA with 24 strikeouts across innings of work. He elected free agency following the season on November 6, 2023.
On April 9, 2024, Stewart signed with the York Revolution of the Atlantic League of Professional Baseball. In 20 games (7 starts) for York, he compiled a 1âÂÂ4 record and 7.90 ERA with 53 strikeouts over 49 innings of work. Stewart was released by the Revolution on August 18.