Having Tommy John surgery before, during or after an ulnar collateral ligament tear will not turn you into the next Clayton Kershaw. You will not wake up from the procedure with an insane fastball and become the next MLB MVP. There are always risks with surgery, and the success rate is not 100%. Implanting a foreign fiber that is stronger than a human ligament will not help. The demands of throwing are so intense that the artificial ligament might not tear, however the bones could shear off and detach the ligament anyway. So, let's stop entertaining Tommy John surgery and work to improve performance and longevity.
Through current sports science we found ways to prevent a UCL tear and subsequent Tommy John surgery. It's not breaking news that pitching is the most violent action in sports. It occurs at thousands of degrees per second and puts massive amounts of stress on one of the weakest joints in the body. The motion generates huge amounts of torque at the elbow, especially during the late-cocking phase and at release. So, you do what you can to limit wear-and-tear on your body.
Building the posterior muscles of the body can help alleviate stress on the shoulder and elbow during the follow-through phase of throwing. Having more stability and mobility in the core allows the shoulder to work more efficiently and have less stress. Having good posture "being able to properly retract the scapula" puts less stress on the elbow. The more the big muscles in the posterior chain are engaged the less the small muscles have to work! SO, train your posterior chain and let the big muscles decelerate your throwing motion!