Well before Floyd Mayweather Jr. defeated Oscar De La Hoya in 2007 and definitely after, the two legendary boxers really haven't seen eye to eye on much.

Upon seeing Mayweather defeat Andre Berto in September and announce his retirement, De La Hoya is glad to see the undefeated champion leave the sport.

To drive that point home, De La Hoya penned a scathing letter to Mayweather in the December issue of Playboy. The letter has "The Golden Boy" calling Mayweather "boring" and telling him that boxing will be better without him in it.

"You did it. You made it to the 49-0 mark, a milestone that you like to say only the great Rocky Marciano reached but that was actually achieved by others, including my idol Julio Cesar Chavez — but who's counting," De La Hoya started the letter writing. "And now you're retiring. Again. (The first time was after our fight in 2007.) This time you say it's for real. You're serious about hanging up the gloves. On to bigger and better things. So I'm writing to you today to wish you a fond farewell. Truth be told, I'm not unhappy to see you retire. Neither are a lot of boxing fans. Scratch that. MOST boxing fans. Why? Because the fight game will be a better one without you in it."

But De La Hoya was just warming up, peppering Money with more stinging jabs.

"Let's face it: You were boring," De La Hoya continued. "Just take a look at your most recent performance, your last hurrah in the ring, a 12-round decision against Andre Berto. How to describe it? A bust? A disaster? A snooze fest? An affair so one-sided that on one judge's card Berto didn't win a single round? Everyone in boxing knew Berto didn't have a chance.

"I think more people watched Family Guy reruns that night than tuned in to that pay-per-view bout," he added. "But I didn't mind shelling out $75 for the HD broadcast. In fact it's been a great investment. When my kids have trouble falling asleep, I don't have to read to them anymore. I just play them your Berto fight. They don't make it past round three."

De La Hoya went on to state that boxing is better off without him because he was "afraid of taking chances," alleging that Mayweather purposely picked on Canelo Alvarez early in 2013 and Manny Pacquiao late this past May, when the bout was supposed to happen five years ago.

Is De La Hoya making valid points or is this just a case of sour grapes?

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(Photos from left: Jonathan Leibson/Getty Images for WE tv, Ethan Miller/Getty Images)