Holman split the 2023 season between the ACL Athletics, Lansing, and the Double-A Midland RockHounds. In 35 total appearances for the three affiliates, he registered a 4.26 ERA with 60 strikeouts and three saves over 44+1⁄3 innings of work.[7]
Holman began the 2024 season with Double-A Midland, making 17 scoreless appearances with 24 strikeouts and 6 saves. In June, he was promoted to the Triple-A Las Vegas Aviators, where he had an 0.92 ERA with 30 strikeouts over 23 appearances. On August 16, Holman was selected to the 40-man roster and promoted to the major leagues for the first time.[8] In 18 appearances for Oakland, Holman logged a 1-1 record and 4.02 ERA with 16 strikeouts across 15+2⁄3 innings pitched.
Holman was optioned to Triple-A Las Vegas to begin the 2025 season.[9] The Athletics recalled him on April 23, 2025.[10] In 22 appearances (two starts) for the team, he posted a 4-2 record and 5.09 ERA with 17 strikeouts over 23 innings of work. Holman was optioned back to Las Vegas on June 16, after J. T. Ginn was activated from the injured list.[11] However, on June 19, Holman's option was rescinded and he was placed on the injured list with rotator cufftendinitis.[12] On July 15, he was transferred to the 60-day injured list.[13]
On February 15, 2026, Holman was claimed off waivers by the Arizona Diamondbacks.[15] He was optioned to the Triple-A Reno Aces to begin the regular season.[16] However, on March 25, Holman was designated for assignment by the Diamondbacks.[17] Holman was claimed off waivers by the Los Angeles Dodgers on April 1.[18] On April 11, he was claimed off waivers again, this time by the Detroit Tigers.[19]
