THC(A)/CBD(A) products either as an edible, topical, or vaporized can help relieve some of the pains. Cannabis is its nature has anti-inflammatory properties.
Yes, a good strong topical like Sweet Releaf can do wonders for any repetitive action injury like baseball elbow. For mild injury, the original formula (124 mg THC/THCA/CBD per 2 oz jar) will be fine but for severe pain I suggest the Extra Strength version (248 mg THC/THCA/CBD per 2 oz jar). Apply at least twice a day ( or more if pain returns sooner) for several days to really get maximum effect.