Rob Gronkowski isn't leaving the gridiron for the big screen, the squared circle or the dirt-bike track. Gronkowski will return to the Patriots for a ninth season in 2018, the All-Pro tight end announced via Instagram on Thursday. "I met with coach today and informed him I will be back for the 2018 season with the Pats," Gronkowski wrote. "I have been working out, staying in shape and feel great. Looking forward to another championship run." Coach Bill Belichick must have been pleased with the meeting, as agent Drew Rosenhaus told ESPN that "it was very positive and Rob is committed." Retirement speculation has swirled around Gronkowski since he vowed to "sit down" and contemplate his future in the wake of New England's Super Bowl LII downfall. While Gronkowski remained silent on his 2018 plans, rumors surfaced suggesting he would consider leaving football for a career as a big-screen action hero or professional wrestler. After skipping voluntary workouts last week, Gronkowski added fuel to the fire with a bizarre promotional news conference that cited dirt-biking as the reason for his continued absence.