Hey guys I was looking on google for why my bicep hurts when I throw and this thread came up so I join so I can chat about it. Ive freaked myself out looking it up and coming up with the possibility of tendonitis and surgery so I figure why not ask some people that may actually know. I am currently 27 and havent played baseball since I was probably 13 although I have had sometimes where I play catch. I recently joined a friend in an adult softball league. After throwing for a bit when I start trying to put some power on my throws my bicep starts hurting pretty much dead center in the middle of the muscle. If you guys have any ideas or need me to make videos or anything please let me know. Also if it makes a difference I am left arm throwing and am a natural lefty.