Ortiz tried to headbutt Mayweather 2wice. He missed once, and connected the other in the 4th round. Ortiz was fighting dirty. Herb Dean and Joe Cortez always say it "Protect Yourself at all Times!" Ortiz was playing dirty, so Mayweather capitalized on his tardiness.
I was at the MGM Grand and got to watch this fight for free because some guy got the complementary viewing tickets for the MGM Conference room tv viewing CCTV. He gave two tickets to my fiance and I and he got upgraded to see the actual fight at the Grand Garden Arena.