Full fight videos: Floyd Mayweather vs Miguel Cotto and Robert Guerrero

Floyd Mayweather has run his pro record to 44-0, and save for a few tough nights, most of them have been dominant exhibitions of his world-class talent. His two most recent fights, however, told very different stories, and may be something that young Canelo Alvarez can learn from this Saturday on Showtime pay-per-view.

Let's look back at Mayweather's wins over Miguel Cotto and Robert Guerrero.

May 5, 2012 vs Miguel Cotto (UD-12): Though the Puerto Rican star had more success than most, Mayweather still won a clear decision on scores of 117-111, 117-111, and 118-110, thought by some to have been too wide. After this fight, Mayweather served a short jail sentence in Nevada, and when he returned to active boxing duty, he replaced his uncle Roger as lead trainer with his father Floyd Sr, noting that he felt his defense wasn't quite as good as it should have been.

May 4, 2013 vs Robert Guerrero (UD-12): After a year off and the aforementioned jail stint, plus reuniting with his father, Mayweather made it look easy at 147 pounds against Guerrero, a determined but overmatched fighter who didn't have the speed or skill to hang with Floyd. The dominant win was Mayweather's first under his new Showtime contract, and was a disappointment in pay-per-view sales, as Guerrero simply failed to get the public interested in what was viewed from the get-go as a one-sided fight, as it turned out to be.