A few weeks ago I had a pretty good bullpen session, throwing every pitch for strikes except for my curveball. I've always had trouble getting topspin on it and after I was done my coach had me play catch with him throwing only curveballs from around 60 feet away. I finally got the it to spin correctly and my curve was great the next week. But the week after that I was on maybe my fourth or fifth curveball at the end of my bullpen session and I felt a little pop in my elbow. This isn't something that is uncommon for me but it usually happens when I begin warmups. The thing that was different about this one was that it had a little sting in it.
I've never had an arm injury before and I do keep my arm in good shape. I've also been icing after every throwing session.
Two weeks have passed and the sting is still lingering. It's not a sting that is painful, it's just kind of annoying.
One thing I have noticed is that my fastball has naturally been coming out 3-5 mph faster than normal with no extra effort on my part, which I find odd.
What do you guys think is up? I'm leaning towards a growth spurt or tendonitis.
I'm a 16 year old lefty, 6' 180 lbs. Fastball usually around 72-76.