Inverted w isn’t a problem and isn’t a greater risk factor for injury. It’s just a way to say ones mechanics are better than this injury prone pitcher(who uust so happens to have an inverted w).
Does that explain the injuries (or elbow injuries specifically) of all the other pitchers with inverted abc’s… No.
There are many more factors one could name than just 1 which always is the case with pitching mechanics.
Threw too many curveballs/forkball/etc at a young age.
Supination on the fastball or throwing around the ball.
I don’t really like the drag in titles or pitching emails