Was Khan's headbutt to McCloskey deliberate?

[sdcluser]

Hmm.....Nah.
Remember, Khan gave this dude a chance to fight him.

However, base on his last few fights, we can say that Khan is predominantly a front runner especially first 4 rds. When he encounters a good/decent boxer, he is gonna be dragged into a decision. I see problem with Khan facing a tenacious guy like Bradley.