first_imgINDIANAPOLIS — Jon Gruden saw a picture of D.K. Metcalf without a shirt on and wanted to hit the gym himself.Metcalf is chiseled beyond belief, reportedly recorded this week with a 1.6 body fat percentage while weighing 228 pounds. He’s gone viral on social media because of a shirtless gym picture, and Gruden said Metcalf is the biggest wide receiver he’s ever seen. He tied Arizona State’s N’Keal Harry with the most bench press reps (27) among wide receivers on Friday, and only two others …last_img