Iowa State's Brock Purdy (15) hands the ball off to Breece Hall (28) during the first half of an NCAA college football game against Texas Tech, Saturday, Oct. 19, 2019, in Lubbock, Texas. (Brad Tollefson/Lubbock Avalanche-Journal via AP)

Iowa State coach Matt Campbell hugs Brock Purdy (15) after scoring a touchdown during the first half of an NCAA college football game against Texas Tech, Saturday, Oct. 19, 2019, in Lubbock, Texas. (Brad Tollefson/Lubbock Avalanche-Journal via AP)

Texas Tech's Jett Duffey (7) passes the ball during the first half of an NCAA college football game against Iowa State, Saturday, Oct. 19, 2019, in Lubbock, Texas. (Brad Tollefson/Lubbock Avalanche-Journal via AP)

Iowa State's La'Michael Pettway (7) catches a touchdown pass around Texas Tech's Damarcus Fields (23) during the first half of an NCAA college football game, Saturday, Oct. 19, 2019, in Lubbock, Texas. (Brad Tollefson/Lubbock Avalanche-Journal via AP)

Iowa State's Brock Purdy (15) passes the ball during the first half of an NCAA college football game against Texas Tech, Saturday, Oct. 19, 2019, in Lubbock, Texas. (Brad Tollefson/Lubbock Avalanche-Journal via AP)

Iowa State's Dylan Soehner (89) breaks away from Texas Tech's Thomas Leggett (16) during the first half of an NCAA college football game, Saturday, Oct. 19, 2019, in Lubbock, Texas. (Brad Tollefson/Lubbock Avalanche-Journal via AP)