I’ve wanted to take a look at Jason Day’s swing for some time as he is a young and talented power swinger on the PGA Tour, but recent injury problems with his thumb kept him out of play for a bit, and it wasn’t logical to look at his swing while he nursed an injury anyways.
He seems to have recovered, and I found a slow motion face-on swing of his, and my initial suspicions were confirmed – Day will likely run into lower back and/or leading knee issues as he gets older, if not sooner.
Part of the reason is how hard he swings. He rips at the ball, and while his setup and mechanics are nearly flawless, the “modern swing” part of his move is what will catch up with him sooner or later if he keeps on.
Jason Day Swing – Slow Motion
Remember, we all feel immortal in our early-to-mid 20’s, and the damage we inflict on our bodies is oftentimes cumulative, meaning you begin to feel the effects after it’s too late to stop the damage.
Jason has a great setup, with left-biased position, except for the leading foot.
He’s got a very quick, almost violent change of direction from the top to begin the down swing, and here is where his weightlifting comes to the rescue as he muscles the club down and into impact, good Trebuchet Drop and staying with the head (and the impact position shows why JD’s the highest-ball hitter on the Tour, look at that launch angle with driver!) but then there’s that lower back twisting as he comes to the finish.
A little foot twisting is expected of course on the finish, and again we see the hyper-extending leading knee. I don’t envy his left hip joint in a few years.
Jason Day is a fine player but he will likely run into physical issues due to the violence of his swing combined with the mechanically unsound things he’s doing.
The things I’ve pointed out likely contribute to his being a great player who just can’t seem to make it across the finish line in the majors (or even regular events, this kid should have ten wins with a swing like that). The things I mention, the restricted pivot and the violent change of direction at the top, will cause consistency issues, and especially on weekends when under the gun.
Still, a pretty good swing from a very talented young player. Nearly as good as it gets…