You know the pattern. You stripe it on the range, then on the first tee the ball starts right and keeps going right. So you try to swing more inside, you try to roll your hands, you try to "fix" your swing, and the slice gets worse. Here is the thing nobody tells you: sometimes the fastest fix is not in your swing at all. It is in your setup.
Most slicers and over-the-top players set up with their feet too square to the target line, sometimes even a little closed. From there, the club has nowhere to go but across the ball. You can have the best intentions in the world about swinging inside-out, but your stance has already taken that path away before you even move the club.
The fix is almost embarrassingly simple. Drop your trail foot back six to eight inches. Sometimes a full foot. That is it. This opens your stance relative to the target line and instantly creates the room your club needs to approach the ball from the inside. You are not forcing an inside-out path. You are just giving the club permission to find one. The result is less flipping through impact, better control of the clubface, and a higher, straighter ball flight. It works especially well for players who pull or cut across the ball when the pressure comes on, because it takes manipulation out of the equation.
Here is how to practice it. Take your normal setup aimed at your target. Now drop your trail foot straight back six to eight inches while your lead foot stays put. Keep your shoulders and hips relatively square to this new stance line. Make smooth swings and feel the club approaching the ball from the inside. Hit eight to ten balls and pay attention to three things: your start line, your path, and your height. All three should improve without you changing a single thing about your actual swing.
The one mistake to avoid: dropping the foot but opening your shoulders along with it. If your shoulders point left of target (for a right-hander), you have just aimed yourself into a pull. The foot drops back. The shoulders and hips stay square to the new line. Let the lower body setup do the work and keep everything else quiet.
Sometimes the fastest fix is not in the swing. It is in the setup. Drop the trail foot back, create room, and let the club come from the inside.
This drill is one of 220+ in the Pro Vault at coachellapro.com for $1 a month. And if your slice keeps coming back no matter what you try, come see me for a lesson in La Quinta. We will sort it out in 45 minutes.