He was positive Whitt would say yes and didn't have a contingency plan. The book "The System" states that interview with Bronco (after Whitt said no) went badly and TH started TH o look for other candidates. A delegation of players made the case for choosing Bronco.
TH stopped looking elsewhere and hired Bronco. We'll never know if Broncoi was the best available because TH did not conduct a thorough search