The No. 4 Baylor Bears are perfect no more after the No. 10 Oklahoma State Cowboys upended the Bears 49-17 on Saturday at Boone Pickens Stadium in Stillwater, Okla.

With the score knotted at 0-0 late in the first quarter, the tide of the game swung in Oklahoma State’s direction when Baylor junior quarterback Bryce Petty was racing for what looked like an easy touchdown, instead Petty tripped in the open field and stumbled untouched to the 1-yard line.