I've had a surgery very similar to what Alex is facing where I had L4 & L5 fused to prevent further slippage. I can certainly attest to the leg pain one feels with this condition (terrible) and the relative inability to perform any act that baseball would require. I am several decades older than Alex and can also say that he should recover well enough to do any activity he wants to do for the rest of his life and send out prayers for a speedy recovery! He's a great kid!!