When do sportsbooks post their boxing lines?

[ThaHero]

Not sure if I can get any help here, or should go to the Sportsbetting forum. I was wondering how early the boxing lines are up in the Vegas B&M casinos. I'm going to Vegas this weekend and a friend wanted to give me money to place some bets on boxing. I told him maybe the Cotto-Judah line(They fight on June 9th) might be up, but I really don't know. Online is not an option. Any help is appreciated.