NFL coaches often say that college football offenses don’t really get quarterbacks ready to play at the next level. But Texans coach Bill O’Brien says that’s not the case with his rookie quarterback, Deshaun Watson.

O’Brien says Watson ran an offense at Clemson that forced him to develop a mind for football at the highest level.

“He had to learn a pretty sophisticated offense at Clemson,” O’Brien said, via the Houston Chronicle. “He had to do a lot of things at the line of scrimmage. I think he was trained really well. That’s a credit to the Clemson staff. He’d already been in some big games when he got here. When he came here, he put his head down and came to work every day.”