Here’s a post that was made on another board in a forum that had few umpires. I thought I’d post it here to see if the umpires would care to comment.
Ground ball to the infield, and the fielder fires to first. The throw is off target, to the home plate side, pulling the 1st baseman off of the bag. His foot is clearly not in contact with the bag. He catches the ball, and reaches around to tag the runner as he is being passed. He does this, before the runner reaches the bag. Only thing is, the runner's helmet had come dislodged just a moment before, and has not yet hit the ground. The helmet is in the process of falling - down the runner's back. The 1st baseman's mitt hits the helmet, which is touching the runner's back. Safe or out? I guess the real question here is whether or not the helmet at that point is considered part of the uniform, or not.