longest hr in fenway park was hit by?
Ted Williamsâs blast remains Fenway Park benchmark. Share via e-mail. Barry Chin/Globe Staff The red seat marks the spot of the longest home run ever hit at Fenway Park â 502 feet by Ted Williams on June 9, 1946. For a night, baseballâs defining distances will no longer be 60 feet, 6 inches or 90 feet.