[1][2] On February 11, 2020, MLL announced that it had granted an expansion franchise to the Fairfield, Connecticut, one day after the league folded the Dallas Rattlers.

The league named Rattlers' head coach Bill Warder to the same position with the Connecticut Hammerheads.

[1] Less than a week later, the Hammerheads announced they were trading Bryce Wasserman, a Dallas native, to the Boston Cannons in exchange for Will Sands.

Kraus was also a selection with the competing Premier Lacrosse League, but on May 14 he officially signed a two-year deal to join the Hammerheads.

[4] On July 18, the Hammerheads played their first game, in quarantined fashion at Navy-Marine Corps Memorial Stadium in Annapolis, against the Denver Outlaws.