Tampa Bay Rays prospect Tyler Zombro is clearly lucky to be alive today ... the pitcher revealed he needed brain surgery after being drilled in the head by a line drive this month -- and the scar he showed off Thursday is gnarly.
Zombro -- who was struck by a comebacker in a minor league game on June 3 -- posted pics from his recovery on his Twitter page ... and it's truly miraculous he appears to be OK following the scary scene.
Zombro showed the entire right side of his head was opened up by docs after he was hit by the baseball .