I don't typically do comprehensive rankings, but I would probably rank tiers something like this, also in approximate order within tiers:
- Tier 1 - Elliott (22), Gurley (23)
- Tier 2 - Bell (25), Fournette (22), Hunt (22), David Johnson (26)
- Tier 3 - Mixon (21), Cook (22), Kamara (22)
- Tier 4 - McCaffrey (21), Howard (23), Gordon (24), Freeman (25), Henry (23)
That is 14. After that, as you noted there is a large group that is IMO more difficult to separate. There is a large age/mileage disparity between most of the players I named above and the likes of Martin, Ingram, Hyde, Miller, and McCoy. How to rank that older group will vary based upon one's opinion of the importance of age.
I suppose I could see Ajayi at #15 given your bolded statement combined with his age (24). But I have low confidence in that ranking. I also know another rookie class gets injected after 9 more regular season games, and I expect at least a few rookies (e.g., Barkley, Chubb, Adams, Harris, Guice, Love) to inject into the tiers I laid out above, pushing others including Ajayi down.
The original question that led to this tangent was how Ajayi compared to Mixon, Cook, and Kamara. I have all three of them in my top 9, and Ajayi in a gaggle that falls between 15-20+. Hence my initial reaction.
The last time I tried to do dynasty rankings was last January, so we have about half of the regular season played now which certainly changes things now. Also my last ranking did not include any rookie players.
I usually don't like slotting rookie players with veterans until those players have played 2-3 seasons in the NFL. For those comparisons I usually go back to my rookie rankings as far as what tier I ranked them. For me Ajayi was a tier one rookie. Right there with Gordon as a prospect in my view. He was drafted later than I expected, so that information would be a bit of a downgrade, but I still believe Ajayis talent level was/is similar to Gordon, and as a tier one player still in the same tier as Fournette, Cook, McCaffrey and Mixon for me.
I am somewhat not sure why these rookie players who have not proven what Ajayi did n 2016 in their careers yet would be catapulted ahead of players like Ajayi and Gordon automatically upon entering the NFL?
I know some people do that, I don't. I don't rank the rookies with the veteran players until after they have played a couple seasons. So we differ as far as the view point that rookies coming in 2018 will push Ajayi down in rankings, to me that is premature.
What my rookie tiers mean is that I see the players upside being either top 12 (tier one) top 24 (Tier two) or top 36 (tier three). I give these rookies 3 seasons to reach that upside target before ranking them with the veteran players. WIth RBs you often can know a bit sooner than this, such as two seasons, but sometimes you cant. This is a seasonal ranking, as I think that is how players should be measured for dynasty, in terms of the quality and quantity of their seasons, not games which is a smaller scale or more discrete ranking. You do make an excellent point as far as Ajayi only having 4 really strong games so far in his career. However it is a bit arbitrary as well, some of his other games should be considered
good enough and those four games were exceptionally impressive.
Jay Ajayi did hit this upside target last year when he was a top 12 RB. So for the way I am ranking the rookies, I think my ranking was correct. The reason it takes more than one season to judge the ranking is often you will have players who do not hit that target in their rookie season, which historically is a RBs worst season on average. The best season for a RB on average is their 3rd season.
Melvin Gordon similar to Ajayi did not reach the tier one target in his rookie season. It would have been premature in my view to dismiss Ajayi or Gordon as tier one rookie prospects after their rookie seasons. Both did hit that tier one in their second seasons. Todd Gurley hit this target as a rookie, then fell off to RB 19 in his second season. So in that sense going in to the 2017 season all 3 RB were equal in my point of view. Each had one top 12 season and one season not as good in their two year careers.
Now in year three Gurley and Gordon are top 12 RBs. Ajayi is not after 8 weeks. So there is some reason to drop Ajayi down at this point. However looking at this in a longer term point of view, it is still early to really say that in my view. It is a perspective based more on what has happened with the players recently this season, instead of a longer term point of view.
I have always had Gurley and Gordon ahead of Ajayi, but as rookie prospects Ajayi in the same tier as those two. Now with 2.5 seasons played I think that is correct. Gurley and Gordon are looking like they will have 2 out of 3 of their first 3 seasons as top 12 RB. Ajayi will need some monster games over the rest of the season to have a second top 12 season. So those two are higher than Ajayi. In fact going into last season when I ranked all of the players in January, I had Gurley, Gordon, Freeman, Howard all one tier ahead of Ajayi in those rankings (that did not include rookies) and I had Ajayi as the first player of the next tier which included RBs McCoy, Henry, Hyde, Miller, Ingram.
What has happened with Ajayi this year has not really changed my point of view about him being in the same tier as these players. It is always possible that Ajayi does well with the Eagles and returns to the top 12 of RBs in the 2018 season if not this year.
I am reluctant to judge any of the 2017 rookies based only on this season, but I would rather have Cook and Fournette than Ajayi for sure. McCaffrey and Mixon are closer to Ajayi in my view not clearly ahead of him.
FWIW here are my January rankings which was posted in another thread around here that I don't feel like looking for right now. These rankings look at statistical performance of the players in a few different ways, their age and outlook for upcoming seasons, then gun to the head method for ranking the players inside a tier. I didn't really finish these so they get worse or I have less confidence in the tiers the deeper the list goes.
Odell Beckham 25
David Johnson 25
Ezekiel Elliot 22
Mike Evans 24
Antonio Brown 29
Julio Jones 28
LeVeon Bell 25
Amari Cooper 23
Sammy Watkins 23
TY Hilton 27
AJ Green 29
DeAndre Hopkins 25
Allen Robinson
Keenan Allen 25
Brandin Cooks 24
Rob Gronkowski 28
Todd Gurley 23
Melvin Gordon 24
Devonta Freeman 25
Michael Thomas
Javis Landry
Travis Kelce
DeMarius Thomas
Jordan Howard
Dez Bryant 29
Alshon Jeffrey
Jay Ajayi
Stefon Diggs
Doug Baldwin
Jordy Nelson
Golden Tate
Jordan Reed
LeSean McCoy
Derrick Henry
Carlos Hyde
Lamar Miller
Corey Coleman
Michael Crabtree
Mark Ingram
DeMarco Murray
Tyler Lockett
Devantae Adams
Devantae Parker
Kelvin Benjamin
Randall Cobb
Jamison Crowder
Willie Snead
John Brown 27
Donte Moncrief
As far as FBGs dynasty rankers you mention I trust Couch Potato rankings for dynasty more than the other two, because I understand the process and methodology that goes into his rankings, while I am not aware of the methodology employed by the others for this purpose.