In a twitter exchange where Rob Gronkowski was asked by Phil Perry if he would attend optional workouts with the Pats, Gronk responded: "No." When asked "Why?", he stated, "I've got dirt-biking skills to work on."
Perry persisted, "Are you still contemplating retirement?" To which Gronk replied, "It depends on how my racing skills go today."
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Have you ever seen a 6'6", 265 lb motocross racer?
Gronk just having a little fun in answering a question he is getting tired of being asked.