Thanks for that.
I'm not sure how involved I'll get into grading draft prospects although I did enjoy following you guys through the draft nights but it is interesting nevertheless.
Right now I'm trying to understand the game at a deeper level.
One thing I do find impressive is how much some of you know about each prospect. The draft night threads are truly a must read if only for that.
Yeah, I don't really "grade" prospects, as in, "This guy's a 2nd-round talent, but this other guy is a 5th-rounder at best." Neither do most of the posters in the Draft Talk Forum, which is why I really admire their contributions.
I more or less try to get a feel for how a prospect might fit/be useful in the Pats' schemes. For instance, perhaps there's a CB who's very popular with media draft gurus who grade him as a "1st-round talent". He's bigger than average, "athletic", a ballhawk, and QBs throwing into his coverage have a dismal QBR. OTOH, he's not a particularly willing run defender and misses a fair amount of tackles (kind of a no-no for Pats DBs).
Also, he's played almost exclusively in zone schemes, whereas the Pats now play a lot of man and press. Sure, the media gurus project him to be able to make the transition easily (because of his inherent "talent"), but at least a few of us understand how arduous it was for McCourty to make that transition during his second season in Foxboro, when the Pats made the switch from primarily zone to primarily man.
So, the higher-ranked CB may (or may not) end up with Pro Bowl stats on some other team, but the lower-ranked prospect might be more useful in the Pats defense.
Anyway, for me, SPARQ scores aren't really useful for "ranking" prospects. They're merely a helpful shorthand for things like identifying prospects who may have shown similar athleticism to higher-ranked prospects, but who may be better scheme fits.
And, SPARQ scores don't even come close to telling the whole story, of course. On all of the positional lists, many of the top scorers who are 1+ standard deviations above the NFL average for their position are also late-rounders/UDFAs in the draft, while many of the top-ranked prospects may have average/below average scores (Google: 3sigma nfl). This only serves to highlight the difference on tape that's often expressed as "play speed v. tested speed". The higher-ranked prospects may simply possess "intangibles" that may have allowed them to maximize whatever athleticism they have, at least at the college level.
A case in point would be Malcolm Butler. At his 2014 Pro Day, his measurables were ...
5096/187 ... 4.62/40, 1.62/10-yd split
13 reps ... 33.5" vertical ... 118" long jump ... 4.27 shuttle ... 7.20 3-cone
Those numbers probably would have produced a SPARQ score at least one standard deviation
below average. In the same year, the Pats also had two other UDFA CBs in rookie camp who would have had much higher SPARQ scores, but no one likely even remembers who they were now.
IMHO, what enables Butler to succeed as a boundary corner is his exceptional diagnostic skill - his ability to read the play and the route (or run) before it happens. This allows him to optimize his position and more than offsets his relative lack of natural speed, burst and agility. So, he often "runs the route for the WR" - maybe not quite at Revis-in-his-prime level, but close enough.
OTOH, he HAS been burned by extremely agile and athletic WRs (e.g., Taylor Gabriel), which makes me somewhat skeptical of the notion that Rowe and Gilmore will man the boundaries for 2017, while Butler will drop down from LCB to the slot (where extremely agile WRs make their living). Gilmore has played RCB for most of his career, with some slot mixed in. And, in 2016, Rowe and Ryan, both with significantly more natural agility than Butler, switched off with each other between RCB and nickel/slot (sometimes in the same game), while Butler was almost exclusively on the left boundry.
Rowe: 3.97 ss ... 6.70 3-cone
Ryan: 4.06 ss ... 6.69 3-cone
Gilmore: 3.94 ss ... 6.61 3-cone
I'm more inclined to think that Butler will stay at LCB, while Gilmore and Rowe will be the moveable chess pieces between RCB and slot.