History really tells you that? Aside from Knowles, which other "home run" DCs have we had at OSU in the last 20 years? If you wanna expand that to OC, then go ahead. How many total coordinator hires has he had, and how many where home runs?
I won't argue the definition of home run with you again although it was entertaining last time. And I know you won't be satisfied with anything anyway, but here you go, Gundys prior DC hires.
Vance Bedford- cockroaches aside, young coach, in over his head. Went on to have success later and became DC at Texas. Not a bad hire, just too soon.
Tim Beckman- good coach. Went on to be a HC. Good hire.
Bill Young- older coach with long history of success. DC during 2011 season. Bad yards stats, amazing at causing turnovers. Good hire.
Glen Spencer- promoted from within. Amazing person. 2013 D was outstanding. Eventually couldn't hang with Big 12 Os. Went on to be a HC. Good hire.
Jim Knowles- experienced DC. Initially overwhelmed by Big 12 Os. Made adjustments and, along with experienced LBS and Safeties got better every year. Great hire.
Nitpick it all you want but Gundy hires good coaches and he's getting better at hiring defensive coaches. Have at it.