Despite playing in two NBA All-Star games, Walker never reached his full potential as a pro, partly due to his weight gain. His game had been predicated on quickness. Nonetheless, he averaged 20.9 min ppg in 1969–70, 21.3 in 1971–72, 19.8 in 1973–74, and averaged almost 17 per game over a nine-year career. The numbers are all the more impressive when one considers that Walker teamed with star guards such as Dave Bing in Detroit, and Nate Archibald in Kansas City-Omaha.