Robert Griffin III, quarterback for the Washington RedSkins, will be off the market in his personal life soon. It was recently revealed that he is planning to marry his girlfriend, Rebecca Liddicoat this summer.Griffin, known to football fans as "RGIII," kept the wedding under wraps until now. The nuptials were revealed by RGIII's mother, Jackie Griffin, when she sat down for an interview with DC TV news station Fox 5 this week. The couple's registry at Bed, Bath and Beyond was also a tip-off. The two are listed for a July 6th wedding.