Chris Boswell is the first kicker in NFL history to make 6+ Field Goals in a single game twice in the same season

Source - https://www.reddit.com/r/nfl/comments/1fft8kb/most_fg_yards_by_a_kicker_in_a_single_game_6_fgs/ - me.

Also - https://www.pro-football-reference.com/leaders/fgm_single_game.htm - PFR.

I compiled the earlier list back in September and just watched Boswell bang through number 6.