Marcos "El Chino" Maidana's going to be having a rematch of his December bout with Adrien Broner, leaving Amir Khan as the only candidate on the horizon for a May date with Floyd Mayweather Jr. Recently, Mayweather's father/trainer Floyd Sr. was dishing on the prospects Khan and Maidana have against his son.

Unsurprisingly, Mayweather Sr. doesn't give them much of a chance.

"Both of them easy. Two easy fights; both of them is easy. Maidana might have punching power, but you still can't hit what you can't see," Mayweather Sr. said. So that's going to put Maidana under a tree. Amir Khan's got a glass jaw. And if you look at it too hard, it'll shatter."

That seems to be the dominating sentiment among boxing fans dubious that Khan can provide a realistic challenge to Mayweather, who is coming off a boxing clinic against Saul "Canelo" Alvarez, a premier name in the sport.

The "glass jaw" is especially concerning; Khan's been knocked out brutally in high-profile spots by Danny Garcia and Breidis Prescott. Khan refuses to submit to that stereotype though, claiming he's often been weakened by trying to make a 140-lb. weight limit. He claims to be naturally bigger than Mayweather is, who has campaigned at 154 lbs., and will show off a stronger chin going forward.

"Making 143 was tough. Physically I'm growing. I'm 26, turning 27 [on December 8th], I should have moved up a long time ago," Khan said in December. "Killing yourself makes you a weaker fighter. That's what I was doing my last few fights to try and make weight. I was in the same position when I was at 135. When I moved to 140 I fought Marcos Maidana and Zab Judah, I walked right through them, no problem. I think it will be the same at 147."