"According to research from STATS Perform, 24 true freshmen started at least one game at quarterback in the FBS last season, 11 from Power 5 schools. The increase in true freshman QB starters is most felt at the major college level. From 2009–13 in the Power 5, 43 freshman quarterbacks started a total of 229 games. From 2014–18, 61 rookies started 360 games"
This is from an SI article fro. September......freshman QBs do happen and continue to happen and are setting records...so while the TLs of the world are rare. The Sam Howells and Hilinskis and Nixs of the NCAA world are not