It's not true. Prohm was Pollard's choice. And what exactly does "the story lines up/makes sense" mean?
The fact that Jamie was meeting with TJ prior to Hoibergs departure (when he knew it was highly likely Fred was leaving), the fact that TJ "randomly" came back to ISU knowing Hoiberg was likely leaving, as well as other things that happened between Leath/Pollard/TJ during the hiring process.