I remember seeing a guy take second base after hitting a line drive off a pitcher’s noggin after the ball went flying towards the dugout. I thought that was a little bush. I’ve seen other sports stop play if an injured player is near the action and at risk of getting stomped on or further injured. Kepler would have absolutely stayed put if the guy wasn’t acting like he’d just been hit by a sniper (let’s hope he’s ok).
As Tony soprano would say, it’s a very delicate situation