Corrales-Castillo II: Round-by-round

LAS VEGAS -- A round-by-round account of the Jose Luis Castillo's stunning fourth-round knockout of Diego Corrales in their lightweight rematch on Saturday, a non-title bout.

The rematch of the May 7 fight (won by Corrales) originally was to have been for Corrales' WBC and WBO lightweight titles before Castillo failed to make weight Friday. Usually no title is at stake if a fighter fails to make weight.

Corrales is 40-3. Castillo, now 53-7-1, 47 KOs, was not eligible for either title.

On the undercard, Jorge Arce (41-3-1, 31 KOs) earned a second-round TKO in his rematch against Hussein Hussein (28-3). After Hussein suffered his second knockdown in as many rounds, his corner tossed in the towel. Arce retains his WBC interim flyweight title.

Also, Julio Cesar Chavez Jr. (23-0, 18 KOs) stopped inexperienced journeyman Jeremy Stiers (9-5) 47 seconds into the fifth round of a scheduled six-round super lightweight bout.

Junior lightweight Bobby Pacquiao (26-11-3) defeated former IBF 130-pound champion Carlos Hernandez (41-6-1) by a controversial split decision in a brutal 10-round bout. Even Pacquiao's trainer, Freddie Roach, said Hernandez won. The judges' scores were 95-94 and 95-93 in Pacquiao's favor and 97-92 for Hernandez.

Round 1
The crowd was buzzing as the opening bell rang, obviously anticipating a brawl similar to their epic on May 7, and the fighters didn't disappoint. The fighters fought exclusively inside and neither landed a particularly telling blow. However, Castillo was a little busier and landed a few more crisp punches.
Rosenthal scores it: Castillo 10-9 Rafael scores it: Castillo 10-9

Round 2
Nothing changed in the second round. They fought inside, both throwing and landing a lot of good punches as the crowd ate it up. However, again, Castillo seemed to land the cleaner shots and more of them.
Rosenthal scores it: Castillo 10-9 Rafael scores it: Castillo 10-9

Round 3
Again, only inside fighting. Little holding, almost all punching -- mostly to the body, but also to the head. Castillo rocked Corrales with a straight right that sent the lightweight champion reeling and brought cheers from the crowd but, not hurt badly, Corrales stayed on his feet and continued to fight back. That was the most telling blow of the fight.

Rosenthal scores it: Castillo 10-9 Rafael scores it: Castillo 10-9

Round 4
Castillo landed a thunderous left hook that knocked Corrales onto the canvas and hurt him badly. Corrales, laying on his left said, rolled to his back and then to his stomach as referee Joe Cortez counted. From there, he pushed himself up to one knee and was able to get to his feet as Cortez neared the end of his count. However, eyes glassy, he stumbled badly and it was clear he couldn't go on. Referee Joe Cortez stopped it right there, 47 seconds into the round, prompting Castillo to leap in the air and the fans of the Mexican fighter to go wild.

Dan Rafael is the boxing writer for ESPN.com.
Michael Rosenthal covers boxing for the San Diego Union-Tribune.