Juan Manuel Marquez still undecided on retirement or fighting on in 2013

Juan Manuel Marquez still hasn't made up his mind on what he'll do next in boxing, if he's going to do anything at all, as the 39-year-old superstar continues to say he'll come to a decision after speaking with his family.

Marquez (55-6-1, 40 KO) is of course coming off of the biggest win of his career, a sixth round stone cold knockout of Manny Pacquiao on December 8, finally getting the official win over his great rival. There has been a lot of early talk about a fifth fight between the two in 2013, which would do big business again, most likely, and would no doubt have more buzz going in than the fourth bout -- which itself was very successful, both commercially and artistically.

It's a lot of money to potentially leave on the table, especially with retirement likely around the corner either way. Marquez could possibly be looking at an eight-figure purse for a fifth bout with Manny, and when you're nearing 40 in a sport as unforgiving as boxing, and looking to solidify the future financially for your family, it's hard to imagine any fighter -- especially one still as good as Marquez -- turning down a career-high payday, making the sort of money that very few have ever pulled in.

But, for the sake of argument, if Marquez did choose to retire, you really can't bow out of the sport any better than that, beating one of the biggest stars of a generation with a thrilling KO blast in a great fight to end one of boxing's best-ever rivalries. The odds of this happening seem slim, but you never know. Marquez isn't rushing into any decisions, which is the best part of all of this; it doesn't seem like we'll get another "retirement" that gets turned around as soon as something else comes up, like Glen Johnson or Shane Mosley this year.