ESPN publishes no stat lines for Walt Bellamy. His career totals, as Wikipedia gives them: 20,941 points, 14,241 rebounds, 2,544 assists, 20.1 points per game, 13.7 rebounds per game, 2.4 assists per game.
Walt Bellamy sits top 10 all time in rebounds.
Among the 2,580 NBA players with a career line on file, regular season. A place deeper than 300th is not listed.