Playing hockey can train some great things in your golf swing. Most hockey players that I have tested have great sequencing, and usually have good hip speed. But there are a few major things that hockey players struggle with. As Liam Mucklow said recently, "hockey players love to get 'steep and deep'". This is because it is a very helpful condition for hitting a good slap shot, but it's not helpful for hitting a golf ball correctly. The three issues I see that ex-hockey players face are typically.

1. Sway
2. Excessively closed clubface (especially in takeaway)
3. Forward lunge

This package of swing faults can be frustrating because often times it results in fairly solid mid irons, but struggles with both the wedges and driver swings.