FYI,
My son injuried his throwing shoulder 2 times while in high school. The first time was his freshmen season and while fielding a ball in the hole (he was playing SS) the 3B ran over him and he seperated his shoulder. It took him 6 weeks to recover but he did get to play in the state tournament. The second time was while making an arm tackle while playing DB on the football team. This time it was bad and it took him several months to recover. The 1st ortho said he had a tear and wanted to cut on him pronto. The 2nd ortho wanted him to do 6 weeks of rehab before he even did an MRI. The physical therapist had worked with the Atlanta Braves early in his career and felt early on that my son had an impingment and not a tear. After the rehab he was fine and is now playing college baseball with no shoulder problems. My advice would be to get a 2nd opinion.