Lamb graduated high school ranked as the 170th top prospect in the country and second in South Carolina. He signed with Clemson over offers from North Carolina, South Carolina, Coastal Carolina, and College of Charleston but ended up transferring to Spartanburg Methodist to play Juco ball after the fall of his freshman year. Lamb was at SMC from 2018-2021 and posted a 3.29 ERA while striking out 138 batters in 115 innings pitched. He then transferred to Division II Young Harris College where he stayed from 2022-2023 and compiled a 4.23 ERA, striking out 179 batters in 168.2 innings pitched. The lefty rounded out his collegiate career at Division II North Greenville University for the 2024 season making 10 starts and holding a 4.63 ERA. During the summers of 2023 and 2024, Lamb played in the MLB Draft League for the Frederick Keys. He pitched a total of 66 innings, recording a 2-3 record and a 5.05 ERA, while striking out 63 batters.