AMES, Iowa (AP) — Chris Callahan hit a 19-yard field goal as time expired and No. 13 Baylor rallied from 14 down in the fourth quarter to beat Iowa State 45-42 on Saturday. Shock Linwood rushed for 237 yards for the Bears, who moved to 2-0 in the Big 12 for the fourth year in a row.

Baylor (5-0, 2-0), playing without star wide receiver KD Cannon because of a groin injury, trailed 42-28 before using scoring drives of 86 and 84 yards to tie it up. Baylor’s defense finally stiffened in the fourth quarter and Seth Russell — who was 12 of 22 passing for 178 yards — drove Baylor 83 yards to set up Callahan’s chip shot.

Joel Lanning threw for 261 yards and two touchdowns for Iowa State (1-4, 0-2). Mike Warren added a season-high 130 yards rushing for the Cyclones who travel next week to face Oklahoma State in the second game of a brutal stretch. Iowa State plays at Texas the following week and, after a bye, hosts Kansas State and Oklahoma.