DENTON, Texas -- Tre Siggers ran for two touchdowns and Mason Fine fired two touchdown passes as North Texas rode a 17-point second quarter to a convincing 45-3 win over Texas-San Antonio in the Conference USA opener Saturday night.

North Texas bounced back from a tough, 23-17 road loss at Cal to even its record at 2-2.

Fine, who is now 3-1 against the Roadrunners in his career, hit DeAndre Torrey with a 9-yard pass and found Jyaire Shorter from 20 yards out, both in the third quarter, to push the Mean Green lead to 38-3.

Siggers finished with 14 carries for 143 yards and two touchdowns. Torrey ran 13 yards for a score to go with his three catches for 60 yards and a touchdown. Fine finished 15 of 22 for 195 yards and two scores.

The Roadrunners (1-3, 0-1) got their lone score just before halftime on a 25-yard field goal by Hunter Duplessis.

Lowell Narcisse was 16 of 36 for 124 yards for UTSA but was picked off twice. Narcisse carried 15 times for 98 yards.