No.
First of all, the stats are wonky. Ward had a lot more attempts, so if you tinker with Mertz's numbers, it will have a more profound impact.
Second, this whole "eliminate the passes behind the line of scrimmage" nonsense...would ALSO reduce Mertz's accuracy percentage...would ALSO reduce Mertz's yardage...and actually PROVES that Mertz IS INDEED "Checkdown Charlie", if such a high percentage of your passes and yardage are...you know....passes behind the line of scrimmage.
Third, to use an extreme example...if Mertz completed 100 passes, and 99 of them were "behind the line of scrimmage", while one of them was a 75 yard touchdown, then YES, his yards per target would skyrocket to 75 yards per catch, but that would NOT suddenly make him a great "downfield passer". That, again, would be statistical PROOF that he is "Checkdown Charlie".
Here's the thing. I've shown this on other threads, so I'll sum up. First, we have proven that Mertz's VOLUME of downfield throws was very low. Second, we have proven that Mertz's ACCURACY on downfield throws was atrocious. Furthermore, his volume of total passes is not enough that you have a grouping of "long passes" which tells a story, and then another grouping of "behind the LOS passes" which fudges up the statistics of this fine, fine downfield thrower. This is just insanity.
I had this conversation with
@flagator86 on the Gator Tears thread, at least related to the way in which Slingblade Billy misused Eugene Wilson's speed. So even if we include the entire receiving corps, let's look at the numbers:
In only 5 of Mertz's 11 games did he have his longest pass go for 40 yards or more.
View attachment 298761
1. Utah loss - 40 yard pass to Pearsall
2. McNeese win - 50 yard TD pass to Pearsall
3. South Carolina win - 45 yard pass to Kahleil Jackson
4. Arkansas loss - 41 yard pass to RUNNING BACK Trevor Etienne
5. Missouri loss - 61 yard pass to Pearsall
So of Florida's five longest pass plays of the year, only ONE went for a touchdown.
Which means that NINETEEN of Mertz's 20 TD passes went for much shorter yardage.
It's easy to be ACCURATE, and INTERCEPTION-FREE, and to pile up MODEST YARDAGE and MODEST YARDS PER CATCH when you are "Checkdown Charlie". So if we eliminate the "behing the line of scrimmage passes", feel free to similarly reduce the attempts, completions, accuracy percentage, and yardage.