What happened: His 18th was an 11th-inning grand slam on Aug. 26 that opened a 7-3 lead.
Why it matters: The round-number mark extends Duran's late-season power surge.
By the numbers: Duran added two homers in 13 days, moving from 18 to 20.
What to watch: His remaining September games will determine how far he pushes the total.