4-time NBA All-Star point guard for the Philadelphia 76ers, who helped lead the team to an NBA Championship in 1983. He became an NBA coach after retirement.
He grew up in the Robert Taylor Homes, a housing project in Chicago.
He served as head coach of the Portland Trail Blazers from 2001 to 2005 then coached the Philadelphia 76ers for three seasons before having a great deal of success as an assistant coach for the Oklahoma City Thunder from 2009 to 2013.
He raised two children with his wife.
He helped develop the game of star forward Kevin Durant during his time as an assistant for the Thunder.