Fans reacted as John Mateer impressed on his debut as the Oklahoma Sooners' starting quarterback. In their season opener against the Illinois State Redbirds on Saturday, the Sooners secured a dominating 35-3 victory.The quarterback completed 30 of 37 passes attempted for 392 yards and three touchdown passes, along with one rushing touchdown.In the process, John Mateer broke the previous Oklahoma debut passing yards record set by Tampa Bay Buccaneers quarterback Baker Mayfield in 2015. In that year's season opener against Akron, Mayfield had recorded 388 yards and three TDs passing in a 41-3 victory. View this post on Instagram Instagram PostFans shared their reactions to Mateer breaking Mayfield's program record."Played a D2 school dawg," one commented."'It's Illinois State' let us have this, we had to suffer through a Jackson Arnold-led passing offense last year," one said.Comments on post"My pick for the Heisman trophy," another wrote."Reminds me of Cam Ward, guys go off at Wazzou and the next school they go," one said.Comments on post"You outmached Illinois State so much they didn't even have a spread available lol," one wrote."Give him the Heisman," another commented.Comments on postMateer began his collegiate journey with Washington State in 2022. He was their starting quarterback for two years. During his three-season stint, the quarterback played 24 games and recorded 3,406 yards and 32 TDs passing.In December 2024, Mateer joined the Oklahoma Sooners after Jackson Arnold transferred to the Auburn Tigers.John Mateer shares thoughts on scintillating debut for Oklahoma against Illinois StateIn the post-game press conference, John Mateer opened up about his impressive performance in the season opener against Illinois State.The quarterback expressed his gratitude for being able to play high-level college football and expressed his love and passion for the game."I would say it's a relief," Mateer said. "It's just joy and passion is for football. "Like I didn't, you know, I didn't come here for the media. And so we could get, I could get the hype. I came here to play football at a high level and to do that and that was awesome. You know, not because of the reactions it's going to get out to anybody."The Sooners next take on the Michigan Wolverines on Sept. 6. It will be broadcast on ABC at 7:30 p.m. ET.