1978 AL East Division had 4 teams with 90+ wins.
And at the end of the regular season we have:
Division Winners:
AL East: Tampa Bay 100-62
AL Central: Chicago White Sox 93-68 (note: they only played 161 games)
AL West: Houston 95-67
NL East: Atlanta: 88-73 (note: they only played 161 games)
NL Central: Milwaukee 95-67
NL West: San Francisco 107-65
Wild Cards:
AL: New York Yankees and Boston Red Sox
NL: St Louis Cardinals and the Los Angeles Dodgers (the Dodgers won 106 games, and they get stuck with a Wild Card...unbelievable)