as of november 2019, ferentz is 15-6 versus big ten rival minnesota and 12-9 versus in-state rival iowa state, though his predecessor went 16-4 against their in-state rival. ferentz notched his 100th career win at iowa with a double-overtime victory over the michigan state spartans in east lansing on october 13, 2012. he became the all-time wins leader in school history, (144) with a victory over northern illinois on september 1, 2018, and has led iowa to 17 bowl games, more bowls than any other iowa coach. later that season ferentz recorded his 150th iowa career win with a blowout triumph over big ten foe illinois on november 17, 2018. when joe paterno was fired from penn state in 2011 ferentz became the dean of big ten football coaches, as the longest tenured coach in the respective sport. with the retirement of virginia tech coach frank beamer after the 2015 season, ferentz became tied with bob stoops for the longest tenured head coach at the fbs level. in june 2017, ferentz became the longest tenured coach with the sudden retirement of bob stoops.