Pearl Jam called on some Red Sox legends to help out during their Fenway Park show

Way back in 2005, then-Red Sox pitcher Bronson Arroyo -- with some studio help from his GM, Theo Epstein -- released "Covering the Bases," both an album of rock covers and tangible proof that he could definitely beat us at Rock Band. One of the songs/bases that Arroyo covered? "Black," the classic Pearl Jam track. 
Over a decade later, Arroyo's in the Nationals organization now, but he's still living the life of your wildest dreams: On Saturday night, he went from covering Pearl Jam to playing Fenway Park with them.

But Arroyo wasn't the only goateed Red Sox folk hero to grace the stage. Eddie Vedder and Co. decided to break out the big guns later on. The big, bald guns:

Just get Mark Bellhorn back here and it'll really be a party.