Tech scored a pair of TDs in the final quarter but could not overcome their less-productive first half, in which they scored only seven points.
The Broncos racked up 507 yards of offense to Tech's 250.
Moore completed 28-of-41 passes for 354 yards, three touchdowns and one interception, which was returned 76 yards for a touchdown by Josh Victorian.
Pettis caught nine passes for 105 yards and Titus Young had nine catches for 110 yards and a touchdown.
Ross Jenkins threw for 114 yards and a touchdown for Louisiana Tech. Daniel Porter and Dennis Morris ran for touchdowns.