Wayne Chrebet? really? why because they are both small and white? because thats really where the comparison ends. All that nonsense about 12-15 years later is neither here nor there, thats not what happened. Welker is not a product of the changing slot position, welker changed the slot position.
Wayne Chrebet career : 104 games started 580 catches 7,365 yds 41 tds
Wes Welker career (fewer games not to mention he's still going strong) : 94 games started 841 catches 9,358 yds 48 tds.
Recap: in 10 fewer starts (with a few more productive years still to come) Welker blows him away in every category 260 more Rec's 1993 more yards and 7 more tds...
There is no comparison in anyway shape or form. Welker is already the better player BY FAR and he's not even done yet..
If the extent of your analysis is comparing stats while ignoring any thing football related(context), you might as well just spare us both the time. Because that doesn't get anywhere with me. I'm quite capable of reading a box score.
Why are they comparable? Because both were undersized players that lacked top-end speed but were incredibly quick, tough, smart, and known for doing the "dirty work".
In Chrebet's 8 years as a starter with the Jets before injuries derailed his career(1995-2002), the Jets had ZERO QBs throw for 4000+ yards. They had ZERO TDs throw for 30+ TDs. They had THREE SEASONS where their QBs threw for 3000+ yards(Testeverde 2x and Pennington). Teams also didn't prominently feature or use slot WRs back then.
In Welker's 7 years as a starter with the Patriots and Broncos, his QB threw for 4000+ yards 5x, 4800+ yards 4x, and 5000+ yards 2x(Brady and Manning).
That should explain why there might be a difference in stats between the guy whose BEST QBs were Pennington and Testeverde and the guy whose QBs were Manning and Brady. That should explain why there might be a difference in stats between the guy whose QB threw for 3000+ yards less than HALF the years he was a starter and the guy who QB threw for 4800+ yards OVER HALF the years he was a starter.
Yea, there's a good reason to look beyond what the pure numbers tell you.
But lets continue with the numbers and go a step beyond your analysis. Wes Welker's 7 years in NE and Denver:
745 catches, 8237 yards, and 47 TDs
Denver and NE's combined passing stats over that time:
2728 completions, 32884 yards, and 264 TDs
Welker's Percentages are:
27.3% of completions, 25.0% of yards, and 17.8% of TDs
Wayne Chrebet's 8 years in NYJ:
507 catches, 6526 yards, and 39 TDs
The Jets combined passing stats over that time:
2531 completions, 28141 yards, and 182 TDs
Chrebet's Percentages are:
20.0% of completions, 23.2% of yards, and 21.4% of TDs
So not nearly as far as off as you've made it seem. Welker is significantly better in the % of completion(7.3%) while Chrebet has a decided edge in % of TDs(3.6%). Welker has the edge in % of yards(1.8%). And that's ignoring what I've already stated earlier about Chrebet not being used the way he could have been 12-15 years later
because he had to play outside...instead of being used in the slot where his skill-set was maximized like Welker was.
Yea, I think it's a pretty fair point to make.