[3] As a senior in 2018, he went 7–0 with a 0.58 ERA and ninety strikeouts over 48 innings alongside batting .369, and was named the Treasure Coast Newspapers Player of the Year.
[4] After his senior season, he was selected by the Cincinnati Reds in the second round (47th overall) of the 2018 Major League Baseball draft.
[11] After the cancellation of the 2020 minor league season due to the COVID-19 pandemic, he flew to Palm Beach Gardens, Florida, and spent the summer working out at Cressey Sports Performance, participating in simulated games with fellow minor leaguers.
[13] Richardson was assigned to Dayton, now members of the High-A Central, for the 2021 season; he appeared in 19 games (18 starts) in which he went 2–5 with a 5.09 ERA, 91 strikeouts, and 38 walks over 76 innings.
[16] Richardson split minor league time in 2023 between the Daytona Tortugas, the Chattanooga Lookouts, and the Louisville Bats.