It's an IQ test but does it help evaluate NFL players?

Ryan Fitzpatrick went to Harvard and was said to have gotten a perfect socre of 50. It turns out he might have only got 48 which is still really high. He bounced around 9 teams and threw tons of interceptions. He would go from amazing to horrible "Fitz-Magic" to "Fitz-Tragic"

In contrast Lamar Jackson is said to have scored a 6 which is laughably bad. He just won his second Most Valuable Player award last week.

Yeah, a lot of it is snake oil. Like how does a mental test access how someone does on a physical task like sports?

Surely some part of sports is in your head. Not saying those tests measure it.