Actually, year 4 of the Prohm era was #18 NET, #15 KenPom, #16 Barttorvik, and #15 Sagarin.
Also, since you appear to be an Iowa fan, Iowa hasn't had a power 6 win in the NCAA tourney since 1999 when Tom Davis's team beat Arkansas. ¯\_(ツ)_/¯
This is Prohm's 5th year.....and the 2020 season is...