Tonight on HBO, junior welterweight titlists Amir Khan and Zab Judah unify their trinkets at the Mandalay Bay in Las Vegas, and the visiting British fighter is the healthy favorite on the sportsbooks.

Khan (25-1, 17 KO) is as high as a -500 favorite over the 33-year-old Judah (41-6, 28 KO) on three of these five books, and goes down to just -450. Judah, meanwhile, is between a +300 and +385 underdog. Many analysts think that Zab has a good shot here, but history doesn't favor it, and neither do the oddsmakers.

Basically, it looks like the oddsmakers are relying less on the myth of Judah than they are the reality of his career, which indicates that Khan is a deserving, pretty clear favorite in this fight. This is not 50-50 on paper, and the books agree with results instead of reputation. It's not to say Judah isn't a live dog.