STILLWATER, Okla. (AP) -- Le'Bryan Nash hit the winning fadeaway jumper with 4.7 seconds left and blocked Chris Allen's attempt for the tie at the buzzer to lift Oklahoma State to a 69-67 victory against Iowa State on Tuesday night.

The Cowboys (12-12, 5-6 Big 12) avenged perhaps their most heartbreaking defeat of the season, having lost on Scott Christopherson's banked-in 3-pointer at the buzzer in Ames.

After a game filled with back-and-forth runs, this one came down to the final play too.

The Cyclones (17-7, 7-4) wiped away an eight-point deficit over the final 5 minutes behind Allen's strong 3-point shooting, but Nash connected to put OSU back ahead. Allen, who hit a career-high six 3-pointers and scored 22 points, drove past the arc and into the lane, but Nash swatted his shot into the stands and preserve the win.

Markel Brown led Oklahoma State with 19 points. Nash finished with 18.

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