Someone needs to stop Michael Phelps. He is seriously close to being what we call a spokeswhore. He's already got Speedo, Visa, AT&T, Hilton Hotels, Kellogg's, Guitar Hero, Pizza Hut and now, Subway.

Subway restaurants has "announced today a long-term partnership with world champion swimmer Michael Phelps. Mr. Phelps will be representing the brand across all marketing channels and joins an impressive list of athlete partners that have included Michael Strahan, Ryan Howard, Kimmie Meissner, Tony Parker, Laila Ali and Reggie Bush."

When is too many sponsorships bad for the brand that is Michael Phelps? Perhaps, Octagon, the agency that markets Phelps to the public, needs to take a step back and consider. Anyone recall the Phelps/Kellogg's disaster of 2008? Just because you can, doesn't mean you should.

More: Nike's Sacrifice for the Country