Maybe you have the leagues mixed up... I'm not positive.
Rad is the league where you had Rodgers, Cobb, Jordy, etc. But, in the 2017 FA Draft at the start of the season, I took Mahomes with the last pick of the 1st round:
Round 1
1. AllHeDoesIsWin - Jamaal Williams, RB, Packers
2. Indy Extremists - Kareem Hunt, RB, Chiefs
3. Rebuild Machine - Marlon Mack, RB, Colts
4. Bobcats - David Njoku, TE, Browns
5. IBLEEDb&G - Kenny Golladay, WR, Lions
6. Purple Pride - Jarrad Davis LB Lions
7. Project Mayhem - Joe Williams - RB - SF
8. Knuckleheads - Jamal Adams SS NYJ
9. S. Sandwich Islands - SKIPPED
10. Big Blue - T.J. Watt - LB, PIT
11. Orange Crush - SKIPPED
12. Pimps Never Die - Trubisky
13. Gridiron Gang - Chris Godwin, WR, Bucs
14. Snoop Dawgs - Shane Vereen, RB, NYG
15. Pearly Whites - Haason Reddick, LB, Ari
16. Orangutan Gang - Patrick Mahomes, QB, Chiefs
I can't find anyone drafting him in our College Supp Draft in that league, ever.