In what was a terrific fight while it lasted, Dmitry Pirog (17-0, 14 KO) knocked out Danny Jacobs (20-1, 17 KO) in the fifth round with a crushing right hand.

The first four rounds were even on the Bad Left Hook scorecard, and the fight was fought at a good pace, with both prospects showing a lot of talent. Jacobs struggled a bit early with Pirog's pressure and head and upper body movement, but Jacobs managed to regroup and get back into the fight with some great footwork, utilizing his speed and ability and stay out of Pirog's wheelhouse.

But in the fifth, one nasty punch from Pirog ended the fight. After the fight, Jacobs said Pirog gave him a lot of punches he didn't see, including the right (obviously), and that he didn't feel like his legs were there tonight. Here's hoping Danny Jacobs regroups and comes back strong, because he obviously has a lot of talent. Fighters lose sometimes when they take risks, and Jacobs took a real risk fighting a fellow legitimate prospect.

As for Pirog, the 30-year-old Russian really established himself as one of the better middleweight fighters in the world. He looked really fantastic in the ring in pretty much all aspects. Serious power, great movement, good defense, showed a lot of angles. He closer resembled reigning world middleweight champion Sergio Martinez than he did your stereotypical, more mechanical Russian boxer.

Our live coverage continues here, as we ready for the main event tonight.