When the New York Red Bulls beat New England Revolution in MLS on July 5, 2017, Jesse Marsch became the club's all-time winningest coach with regard to regular-season games. His 42nd win in league play as head coach of RBNY was one better than the career regular-season wins record of Hans Backe and Octavio Zambrano during their respective tenures in charge of the first team.
But the Red Bulls don't only play regular-season games. The club competes in the league for a place in the playoffs to compete for MLS Cup - a different competition altogether from the MLS regular season. And it also competes in US Open Cup and (when it qualifies) CONCACAF Champions League. Wins in those three competitions count as much, if not more, as those achieved in league play.
Fittingly, therefore, Jesse Marsch claimed the club's all-time, all-competition record for wins as head coach with a result in a game that was not part of the MLS regular season. On July 13, 2017, the Red Bulls beat New England Revolution, 1-0, in the quarterfinals of US Open Cup. It was Marsch's 53rd win as head coach of RBNY: a new club record.