Unfortunately, it had nothing to do with my foot.
From MTV News:
“I pulled a rotator cuff in my hip,” Shia LaBeouf said, gesturing to his waist. “It’s the only time in my career I’ve ever been injured. What happened was, because the injury got worse and worse as the movie went on, I pulled my groin also. [The groin] is not a good thing to have anything happen to.”