Rob Gronkowski offers an ideal combination of on-field production and off-field personality. In his sixth year as a New England Patriot, Gronk has performed at the highest level while rarely abstaining from having a good time. From the famous “Gronk Spike,” to his personal party bus, his name has become synonymous with entertainment. On the field, the Super Bowl champ is a staple on the NFL’s All-Pro team and has staked his claim as the league’s most productive tight end… ever. Marketers have taken notice of the tight end’s popularity—in his recent book “It’s Good to be Gronk,” he claims to have lived exclusively off of his endorsement income.