Fans congregated to the Mann Center Sept. 9 to watch The Lumineers perform, as well as opening acts Rayland Baxter and Børns. The venue was packed with people. The sold out concert filled the seats, balcony, and lawn with adoring fans. “This is the most crowded I’ve ever seen the Mann,” said concert-goer Mike Innocenti. Upon entering the venue, concert-goers were handed baseball cards with drawings portraying members of The Lumineers posing with a baseball bat in Citizens Bank Park. The back of the card had information about The Lumineers and the opening acts, as well as the date of the concert. The stage was decorated with bright lights and…