The Jacksonville native is entering his first season with the River Rats. Witherspoon was drafted in the 12th round by the Arizona Diamondbacks in 2022 but decided to play college baseball. He spent the 2023 season with the Northwest Florida State College and made 13 appearances. Witherspoon threw 17.1 innings pitched and punched out 24 batters. In his senior year of high school, Malachi sported a 8-1 record with a 0.33 ERA including striking out 81 batters in 43 innings. His twin brother, Kyson, will also play alongside him on the River Rats.