The Original Celtics from New York's tough West Side started the whole professional ball of baketball wax rolling toward what it is today, and once upon a time, in the early 1920s, one of the Celts had an idea. The team, practicing passing and set plays with a 30-1 lead over an opponent in Miami, found the foes' standing guard (a position common at the time) continually getting in the way at his defensive foul line station. The Celt player "volunteered to stand in front of him with my back to the basket . . . so they could pass to me and I could give it back to them. When the guard moved around to my right side, all I had to do was pivot to my left, take one step and lay the ball up. We didn't even know it at the time, but this was the pivot play."

Everybody knows it now, and this volunteer-inventor was Henry (Dutch) Dehnert, basket ball Hall of Fame player and coach - who died at 81, it was revealed yesterday in New York City.

Navy and Notre Dame are shifting their hallowed football rivalry to Giants Stadium in New Jersey in 1980 (Nov. 1) and 1982 (Oct. 30): the Mids' debut in the 76,000-seat Meadowlands park. Can Army-Navy be far behind? . . .