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.