Due to the COVID-19 pandemic, the 2020 season was shortened to five regular season games in seven days, all to be played in front of no fans at Navy-Marine Corps Memorial Stadium in Annapolis, Maryland. The Cannons finished fourth place out of six teams with a 3–2 record, and were the only team to defeat the Denver Outlaws in the regular season. Heading into the postseason, the Cannons were scheduled to play the Outlaws in the semifinal. However, after a player from the Chesapeake Bayhawks experience symptoms of COVID-19 and eventually tested positive, the two other postseason competitors, Chesapeake and Connecticut, withdrew from the tournament. The Cannons' semifinal game with the Outlaws was pushed back a day and would be played as the championship. Boston defeated Denver for the second time in two days, the latter in 13-10 fashion for the franchise's second title, first in nine years. Newcomer attackman Bryce Wasserman, who played for the Dallas Rattlers the season before, was named league MVP for 2020.