IOW, three of these guys who actually accomplished something on the field were drafted late -- Ewers in the 7th, Howard in the 6th, and McCord in the 6th. Gabriel was picked about a third of the way through the draft (#94 of 257).
Whereas Sanders was a .500 QB in college, didn't do all that much on the field, showed up to job interviews unprepared and hostile toward being called on it, and still got drafted in the early part of the 5th round.
And for the talking heads who think it's a racist conspiracy, it's not a very good one because all the guys who actually did something other than run their mouths, yet were still drafted late, are white.