yeah, I have it too... that elbow thing.
Someday I'll ask my Phys Ther buddies for a free consultation.
For me it's all sidearm related, it's the same pain I started getting in my late twenties doing rec pitching. Tennis and basketball don't bother it much at all. But throwing disc did do it it to me this winter. And I know what throw(s) really tweaked it, high torque sidearm anhyzer rollers, haven't fully healed from overdoing those one day. Thumbers do the same thing to me, gentle sidearms are fine though.
I know that pain, and it sounds like what (some) pitchers have before they get Tommy John surgery. Dotel had it last year, he had the ability if he wanted to keep throwing about as hard as before, but with pain every time, so he opted for the knife instead. Ligaments, I guess.