Divisions with no team under .500:
AL East
NL Central
Division with no team above .500
AL West
Teams with surprising start but won't sustain current pace:
Yankees - 12-6
Guardians - 12-5
Royals - 11-6
Tigers - 10-7
Pirates - 11-7
Not sure why you include the Yankees. Not going to keep up their 12-3 start but they seem a 90 win team to me. They have a dude named Soto.