Iowa coach Kirk Ferentz says he is not going to take disciplinary action against defensive end Adrian Clayborn. The native of St. Louis has been accused of punching a cab driver during an incident in January.

Ferentz says, "Sometimes you have enough evidence in front of you where you’re pretty sure something has to be done, and sometimes you don’t. And it is as simple as that," Ferentz says.

Ferentz says he’s not sure what happened in this case, but says Clayborn has been an exemplary student and player and he says based on what he knows, he’s not going to take any action.

Ferentz says Clayborn is practicing with the team. He says Clayborn is in good standing with an asterisk next to it, and until something else comes forward in the process, he will act on it accordingly.