The NBA Development League (NBA D-League) finished the 2009-10 regular season by exceeding one million in total fan attendance for the first time in league history (1,043,261).

Attendance was up more than 6.57% for the season and the Maine Red Claws played to 100% capacity during their inaugural season.

To date, the league also saw an all-time record 34 Call-Ups. There are 80 players on NBA rosters with NBA D-League experience.