The 1970 National Invitation Tournament was the 1970 edition of the annual NCAA college basketball competition. It was unique in that coach Al McGuire of 8th ranked Marquette University, unhappy with his team's NCAA tournament placement in the Midwest rather than the closer Mideast regional, turned down that bid and elected to play in the NIT instead. His Marquette Warriors went on to claim the championship, and as a result the NCAA now forbids its members from playing in other postseason tournaments if offered an NCAA bid.