Avery Bradley is very motivated by the prospect of being the best defender in the league, but he may also want to work on his free-throw shooting.

While playing a fun game of Knockout with several young children at a Celtics charity court unveiling in Belmont, Massachusetts, Bradley became the first player to get knocked out:

Bradley is actually a very good free-throw shooter (78 percent last season) but he was a little too casual with his initial shot and the Leprechaun hat wearing boy made him pay.

Source: CBS Sports / WATCH: Avery Bradley eliminated on his first shot by a young fan in Knockout