Rob Gronkowski Joins Paul McCartney & Bob Weir On Stage at Fenway

There are fewer statements truer than this. Rob Gronkowski is always the life of the party. The New England Patriots tight end joined Paul McCartney and the Grateful Dead’s Bob Weir on stage at Fenway Park Sunday night during a performance of Helter Skelter. What could he possibly be doing on stage you ask? Air guitar and backing vocals obviously. Take a look.