Luke Kornet explained the Tim Duncan reason to why he chose No. 7 as his jersey number after signing with the Spurs this summer.

Journeyman center Luke Kornet departed from the Boston Celtics in free agency and signed with the San Antonio Spurs on a four-year, $41 million deal. The move from New England to Texas comes with a number change for the backup big man, who traded in his No. 40 jersey with the Celtics for a single-digit replacement, selecting No. 7 with the Spurs.

As Luke Kornet gets ready to don the San Antonio Spurs' black and silver in jersey No. 7, he couldn’t resist cracking a joke about the legendary big man who once wore No. 21 in San Antonio.