Forbath will become the fourth kicker for the Patriots this season.
Mike Nugent replaced Stephen Gostkowski after Gostkowski went on injured reserve with a hip injury. Folk replaced Nugent, but Folk underwent an appendectomy Thursday. He will miss at least one game.
The Patriots are 29-of-34 on extra points and 19-of-25 on field goals as a team this season.
Forbath kicked in three games for the Jaguars last season and made 4-of-5 field goals. He was the Vikings’ full-time kicker in 2017.
Forbath has made 85.7 percent of his field goal attempts in stints with Washington, New Orleans, Minnesota and Jacksonville.