Former three division champion Shane Mosley is slightly leaning in the direction of Terence Crawford in the upcoming undisputed showdown with Errol Spence.

On July 29th at the T-Mobile Arena in Las Vegas, the two undefeated welterweights will collide for the WBC, IBF, WBA, WBO world titles in the main event of a Showtime Pay-Per-View card.

Crawford has been more active, but not by much. Crawford has fought three times in the last three years, while Spence - due to injuries - has only fought twice in the last three years. 

Both boxers appear to be at the top of their respective game.

Mosley, who had himself was involved in a blockbuster welterweight fight with Oscar De La Hoya in 2000, expects a very competitive match.

Both boxers have punching power, but Mosley expects the bout to go the full twelve round distance.

"I'm leaning towards Terence more now [because of] activity, but that doesn't really mean anything - because Errol Spence could be in the gym sparring, training with the Charlo Brothers and everybody else and we don't know nothing about it. He could be getting ready right now," Mosley told Fighthype.com.

"It's a 50-50 fight, but it's like we just want to see it already. It seems like if it was going to be a knockout, that it would lean more towards Terence Crawford, but I can see this fight probably going the distance because of the way they both fight.

"Errol is a really good boxer, he has a good chin. Terence is a good fighter; he can fight orthodox or southpaw. I can see this fight possibly going distance. There could be some good moments in the fight, where maybe both of them hit the ground - but I see it going the distance."