Paul Rhoads stuck with Steele Jantz as his starter.
Jantz, playing through a painful foot injury, didn't reward Rhoads, failing to complete any of his first four passes, which included an interception.
Like last week, Rhoads benched Jantz and went with Barnett.
It's paying off, and Iowa State now leads No. 17 Texas A&M, 7-3.
Barnett is taking on the nation's last-ranked pass defense, and looking good doing it. Coaches often talk about new quarterbacks needing to provide a "spark" for the offense, and Barnett is proving why it's more than a tired cliche.
Barnett completed his first three passes for 47 yards and ran for a seven-yard gain.
Unless Barnett gets hurt or hits a string of turnovers, it's hard to see Jantz getting back into this game. The freshman had a rough outing against Mizzou in limited action last week, but this week?
So far, it's all good.