Isn't he also 'just' the President/CEO of FSG so him being at the match is no more than him being at the match?
Sam Kennedy is the president of FSG, not Lucchino. The wiki is wrong on Lucchino, I'm 95% sure he's only a minor partner of FSG. He's basically the Red Sox' Ian Ayre.
"Sam Kennedy serves as President of Fenway Sports Group. Previously, he served as the Executive Vice President of Fenway Sports Group (formerly New England Sports Enterprises, LLC) and as its Senior Vice President of Sales and Marketing. " http://www.bc.edu/schools/csom/research/leadership/programs/leader.html
Thus, my inner Daily Fail
intuition says Lucchino is here to plan out a 130,000 seat renovated Anfield, complete with helipads and gogo dancer cages.
(Or he could have just been enjoying a game of football, like you said. But what fun is that?