Do MLB rules need to be changed considering the Mets won in 7 innings & the Phillies needed to play 19 innings?

In 1964, the Mets played a doubleheader. They were shut out in the first game, and the second game was called after 18 scoreless innings. Manager Casey Stengel commented that the Amazin' Mets were the only team that could play 27 straight innings without scoring a run and only lose one game...