I guess that depends on how you define sleeper. If you define it as "someone not widely known" then you are correct, he's not a sleeper, but if you define it as " underrated and has the potential to outperform their draft position" then I would argue he's a sleeper., but I was doing my best since Andrus already named the best one (Wiley) ;)
Ok, I can see your assessment of outperforming their draft position. In that case, heck yes he’s a sleeper. Walker will be a great player for someone. He’s one of my favorite WRs in this draft.
I typically liken a sleeper to someone who will most likely be selected in the middle to later rounds. Generally the 4th rd and later, but also someone who could sneak into the 3rd.
And yes, Andrus pretty much listed the best sleepers. A few of them.
I’ve mentioned Erick All awhile back and it looks like he’s on our radar.