The dude is awesome!
Tough and I thought I had injuries.

2013 NFL Back Gronkowski underwent an MRI check a disc issue. His vertebra was fractured and operated succesfully on in June
2013 NFL Forearm Rob Gronkowski underwent a total of 4 surgeries to repair broken forearm with the final surgery being on 20th May to clear an infection.
2013 NFL Knee Gronkowski received a low hit to the outside of his right knee, causing it to buckle inward. The torn ACL required season ending surgery
2012 NFL Forearm Broke his arm in Sunday's blowout victory over the Indianapolis Colts and underwent surgery. He missed six regular games.
2011 NFL Ankle Gronkowski sprained his ankle and left game
2009 College Back Gronkowski was reported to suffer a back strain. He underwent surgery missing 13 regular games.
2008 College Neck Rob Gronkowski missed three games of the season while suffering from mononucleosis and strep throat.