Jim Nantz has called many signature events during his nearly 40 years at CBS Sports. He'll reach a milestone on Sunday, though, that only a few NFL announcers have accomplished.

Wilt Chamberlain scores an NBA regulation-game record 73 points to lead the Philadelphia Warriors to a 135-117 triumph over the Chicago Packers. 1971 — Lenny Wilkens of the Seattle Supersonics, at 33, ...