Miami super middleweight prospect Ronald Ellis stayed unbeaten in his fourth pro fight tonight, outpointing Denver's Katrell Straus over four rounds. All three judges had it 40-36, with BLH scoring it 39-37 for Ellis, giving Straus a close third round.

Ellis (4-0, 3 KO) had to go the distance for the first time, and the 22-year-old closed the fight well with a big final round. Straus (2-3, 1 KO) wasn't on Ellis' skill level, but gave the youngster some valuable rounds and was tough, taking some big shots and staying up, pushing it the distance. He did the job he was signed up to do, in other words.

Ellis didn't stand out as a great prospect here, but offensively he has some skills. There is, of course, still a ton of work left to do, but the physical ability is there, and that's always necessary.

Our live coverage of Donaire-Nishioka will continue with all the undercard fights, as well as the main bouts on HBO, including Rios-Alvarado. Keep track with the StoryStream, or join us right now for undercard discussion.