Irving wore No. 11 at two New Jersey high schools before switching to No. 1 at Duke. He wore No. 2 with the Cavaliers for the first six years of his NBA career.

The Celtics retired No. 1 for founder and original owner Walter Brown. They retired No. 2 for former coach and general manager Red Auerbach.

In all, the Celtics have retired 21 numbers, with Paul Pierce’s No. 34 next in line for the TD Garden rafters.