Lawrence and star running back Travis Etienne got plenty of rest as the top-ranked Tigers rolled to a 49-0 victory over The Citadel.
Lawrence was 8 for 9 for 168 yards, including first-half scoring passes of 54 and 17 yards to Frank Ladson Jr. and 44 yards to Amari Rodgers.
Lawrence also rushed for his third TD already this season, leading the way as the Tigers improved to 35-0 against teams from the Football Championship Subdivision. Clemson came out fast, stayed sharp and played just about everybody available in the runaway victory.
Marshall is off to a thundering start.
Brenden Knox rushed for 138 yards and a touchdown, quarterback Grant Wells came up with back-to-back big plays when Marshall needed them and the Thundering Herd beat No. 23 Appalachian State 17-7.