DanAVL

We have to address this pretty frequently with new clients and even some special programs athletes. Seems like a common mobility issue.
Generally we develop a basic series of stretches that they're assigned to do 3-4 times a week. If they stick with it, that's usually all it takes. I've only had one instance of a professional having to become involved.

I find most of this is caused by restriction in the anterior delts, triceps, pecs, and posterior delts. Besides area specific stretches I like the actual rack position stretch, although you need a baseline of mobility to begin that one.