Pendley and senior Brittany Williams each homered for the Sooners in the bottom of the sixth, but the Aggies added another run in the top of the seventh to take an 8-6 lead.
Chamberlain came to the plate with the bases loaded and one out in the bottom of the inning, but lined out, bringing the Sooners within one out of a loss.
Williams hit a seemingly routine ground ball to first base, but the Aggies’ Jenna Stark bobbled it, allowing Williams to reach first and the tying run to score.
But with the Texas A&M infield’s attention focused on first base, speedy OU senior Destinee Martinez rounded third and slid into home for the game-winning run.
“What a heads-up play by Destinee Martinez,” Gasso said. “We had just tied the game, so why not?
“Everybody kinda turning their back to home plate allowed it to happen. That was a really heads-up, aggressive baserunning decision.”