Golfer’s elbow, little league elbow, medial epycondylosis, or medial epycondylosis is basically the same thing as tennis elbow, but on the inside of your elbow. I see a lot more people with golfers elbow from repetitive work and gripping than from golf or pitching, but this sentence is useless.
Like most of the mechanical, overuse injuries we discuss, I think WHY things are happening is a lot more useful than WHAT is happening. What is happening is essentially your elbow hurts. You already knew that, and probably already told me that. You probably even googled it. But google probably didn’t fix you. Giving it a different, even correct, name doesn’t necessarily even help fix it. Knowing what is going on is helpful, but until you know why, treatment is often not fully effective.