Riley was a terrible coach. Nebraska recruited 21, 21, and 20 total players in his 3 classes. He recruited 7 WR recruits over that time frame. 2 were really good and the rest busted out. Thats just terrible roster management from a numbers standpoint. He wasnt filling out classes and getting enough guys
Frost for comparison. Nebraska recruited classes of 25, 28, 26 in his first 3 classes. that literally 17 more players than Riley. Riley basically put Nebraska on probation. They only had like 77 scholarship players in 2017 and a good chunk of them ended up being total busts.