Rob Gronkowski became a giant among giants last season, his eye-popping stats and outsized personality bringing him fame on a team which typically does not have superstars. But now comes the hard part for the tight end: not just being great, but staying great.
Unlimited access to BostonGlobe.com for only 99 cents for the first 4 weeks.Sign up
Are you a home delivery subscriber?
Get FREE access as part of your print subscriptionStart Here
Contact us for help