This drill will improve your release.
Christian Hafer
From here, hit practice balls like normal (with an abbreviated swing) or clip a rubber tee on a range mat. As you do, you’ll immediately know if you’re guilty of an early release — the stick will strike the left side of your rib cage as you approach impact (same goes if you lose your “connection” with the club). The goal is to delay the rod striking your rib cage until the very moment you make contact with the ball (or tee). Go slow at first if you have to.
With this feedback, it won’t take long to kick an early release to the curb. If you still struggle, try more body turn than arm swing.