I think he was just saying an endorsement from him would mean something in comparison to some others.
Remember that Trump ended up with an emphatic victory, beating the polls soundly, when he won the endorsement of Mike Ditka in Illinois.
I think there would be a similar Bobby Knight effect in Indiana. In addition, I think it would freeze a lot of regular pols from endorsing any other candidate.
I wouldn't imagine any of them would want to be on the opposite side of Bobby Knight in Indiana.
Of course, it's your state, so you would know better.
I would like to see Bobby Knight endorse Trump and appear onstage with him, and Larry Bird!