Why the weird name?

Our namesake is the actual lone red seat in the bleachers of Fenway Park. 

Section 42, Row 37, Seat 21.

Back in 1946, one of the greatest Red Sox players to ever put on the uniform accomplished a feat of mythic proportions. Ted Williams (that's his number 9 up on the balcony facade) launched a pitch 502 feet into the right field bleachers - the longest home run ever hit at Fenway Park. The seat was painted red and sits among a sea of green to commemorate the feat and give fans a very visible reminder of the greatness that has been on display at Fenway all these years.