Writer used his metrics explained in the link to rank and tier the top 50 with the reasoning behind each. Purdy is in very good company entering his Sophomore year.
Rank Tier 1 Quarterbacks
1 Tua Tagovailoa (Alabama, JR)
2 Trevor Lawrence (Clemson, SO)
Rank Tier 2 Quarterbacks
3 Jake Fromm (Georgia, JR)
4 Sam Ehlinger (Texas, JR)
5 D'Eriq King (Houston, SR)
6 K.J. Costello (Stanford, SR)
7 Ian Book (Notre Dame, SR)
8 Justin Herbert (Oregon, SR)
9 Shea Patterson (Michigan, SR)
10 Jalen Hurts (Oklahoma, SR)
Rank Tier 3 Quarterbacks
11 Kellen Mond (Texas A&M, JR)
12 Brock Purdy (Iowa State, SO) - Admittingly, this is a bold ranking for Brock Purdy, but his freshman season was quite rare. Purdy is one of two freshmen quarterbacks (Jameis Winston) to average over 10.0 YPA since 2000, and we’ll find out if that was because of Hakeem Butler or not this upcoming season. I’m betting on Purdy.
https://www.rotoworld.com/article/rankings/top-50-college-quarterbacks-2019
Rank Tier 1 Quarterbacks
1 Tua Tagovailoa (Alabama, JR)
2 Trevor Lawrence (Clemson, SO)
Rank Tier 2 Quarterbacks
3 Jake Fromm (Georgia, JR)
4 Sam Ehlinger (Texas, JR)
5 D'Eriq King (Houston, SR)
6 K.J. Costello (Stanford, SR)
7 Ian Book (Notre Dame, SR)
8 Justin Herbert (Oregon, SR)
9 Shea Patterson (Michigan, SR)
10 Jalen Hurts (Oklahoma, SR)
Rank Tier 3 Quarterbacks
11 Kellen Mond (Texas A&M, JR)
12 Brock Purdy (Iowa State, SO) - Admittingly, this is a bold ranking for Brock Purdy, but his freshman season was quite rare. Purdy is one of two freshmen quarterbacks (Jameis Winston) to average over 10.0 YPA since 2000, and we’ll find out if that was because of Hakeem Butler or not this upcoming season. I’m betting on Purdy.
https://www.rotoworld.com/article/rankings/top-50-college-quarterbacks-2019