Seventeen-year NBA point guard known for his defensive tenacity.
He starred collegiately for the University of Illinois and was later named to the school's All-Century team.
He was a 2-time NBA All-Defensive Second Team selection in 1987 and 1990 as a member of the Dallas Mavericks.
He married his girlfriend Sheila, with whom he had a son and three daughters.
He played for several seasons with the Dallas Mavericks alongside forward Sam Perkins.