Sonny Dykes led TCU to a 42-34 victory over SMU on Saturday, winning the Iron Skillet rivalry game against the program that he coached the previous four seasons.
Duggan threw 18 yards to Savion Williams in the first quarter, 8 yards to Jared Wiley in the second period and 80 yards on a shuffle-pass jet sweep to Derius Davis to give the Frogs a 28-7 lead.
Demercado scored from 1-yard out on a drive that began at TCU's 37 following an interception by Josh Newton to put the Frogs ahead 35-21 midway through the fourth. With SMU within eight points in the closing minutes, Demercado burst through the middle and raced 63 yards for another score with 2:31 to play.
Tre Siggers rushed for three short touchdowns for SMU , including a 2-yarder with 5:14 left to get within 35-27 but a two-point pass failed. SMU quarterback Tanner Mordecai threw a 35-yard scoring pass to Jake Bailey with 1:04 left to cap the scoring. Mordecai passed for 372 yards with two touchdowns and two interceptions, and Rashee Rice caught six passes for 74 yards.
SMU entered ranked 10th in FBS passing . Rice was leading the nation averaging 163.7 yards per game and was second averaging 9.3 catches.: Dykes is the first Frogs football coach to win his first three games since Francis Schmidt did it in 1929. The team's previous 3-0 start was in 2017, when Dykes was a TCU offensive analyst under Gary Patterson and the Frogs reached the Big 12 championship game.UP NEXT: The Mustangs' AAC opener will be next Saturday at UCF.