Luke Walton signed Lakers Adidas #4 basketball jersey. Signed on the back. Year 2007-2008. Includes the Genuine NBA holographic sticker with #LL007875 and a Certificate of Authenticity from The Los Angeles Lakers. Size 54. Luke Theodore Walton (born March 28, 1980) is an American professional basketball coach and former player who is an assistant coach for the Cleveland Cavaliers of the National Basketball Association (NBA). He played 10 seasons in the NBA as a forward, winning two NBA championships with the Los Angeles Lakers. He also won a title as an assistant coach with the Golden State Warriors before serving as the head coach of the Lakers from 2016 through 2019. Additionally, Walton served as the head coach of the Sacramento Kings from 2019 to 2021.