J.W. Walsh was picked to start at quarterback for Oklahoma State on Saturday against Texas-San Antonio.
Clint Chelf started the Cowboys' opener against Mississippi State, but as expected Walsh also played in the 21-3 victory.
Coach Mike Gundy named Walsh the No. 1 quarterback on Monday.
''I think he just brought a spark to our team,'' Gundy said. ''I felt like there was a lift when he came in, for whatever reason.''
The sophomore from Denton, Texas, was 18 of 27 passes for 135 yards, and rushed for 125 yards and a touchdown.
''When we started clicking with all the zone read stuff and the up-tempo stuff, that's what we stuck with,'' said Walsh, whose previous best rushing performance was 73 yards. ''A lot of it was just designs on read plays that we had just put in, that we had worked on all offseason, and for the first time to run it and be that successful with it, that was good to see.''
Gundy said he is unlikely to take Walsh out at all now.
''We started to see results from...