Floyd Mayweather may have earned yet another decisive victory to add to his already spotless record on Saturday night, but it didn't come without a cost.
After the fight was over, Mayweather took off his glove to expose an injury to his right hand. It's an injury that he believed came somewhere in the middle of the fight, though he could not recall the exact round.
Chris Mannix of Sports Illustrated tweeted out the news.
Despite the injury, Mayweather utilized the right hand throughout the fight and landed with it consistently. Guerrero gave his best efforts to apply pressure and bring the fight to the longtime champion, but Mayweather's slick defense and, ironically, stiff right hand were too much for The Ghost.
All three judges scored the fight heavily for Mayweather, 117 to 111.
With this win, Mayweather successfully answered all questions about potential ring rust after a year away from the ring. He appeared to be in top condition throughout the night. The fact that he did it while dealing with an injury at some point makes it all the more impressive.
While the nature of the injury isn't clear at this time, it's possible that it could be a threat to his scheduled bout against an undetermined opponent in September.
Many fans would love to see him take on rising light middleweight star Canelo Alvarez next. The 22-year-old recently defeated Austin Trout via unanimous decision and would pose an interesting challenge for Mayweather.
As Mannix's tweet suggests, Mayweather deflected questions regarding his next opponent in his post-fight injury. If it turns out that his hand injury is serious, he won't be fighting anyone in September.