I believe Judge hit his 61st in the Yankees 155th game, so he remains tied with
the Babe for most HRs in a 154 game season. (not counting the PED records)
I seem to remember that Maris' record carried an asterisk for a while over the
154/162 game issue.
Yes, Judge hit #61 in game 155. The 1927 Yankees played 155 games because they tied against the Philadephia Athletics in the 3rd game of the season (they went 110-44-1). Stats counted for all 155 games. The makeup game was either on May 1, 1927 (where Ruth hit 2 homers) or September 27, 1927 (where Ruth hit 1 homer). One of those games is probably the extra game because they're the only singular home games against Philadelphia that were not part of a 3 or 4 game series. Ruth might not have hit 60 if not for this additional game.
Also, Judge hit his 61st homer on his 151st game played this season, which is the same number of games Ruth played in all of 1927 when he hit 60.
The 1961 Yankees also played an extra game because of a tie and Maris hit the record breaking homerun in game 163 (his 161st game played that season).