[JJ]

Why are 1B umpires standing well into foul ground with a runner being held on first base? I know you can see a pickoff better, but it takes you out of the loop for a fair/foul shot over the bag.
I'm seeing umpires do this in 3-man games locally, and I THINK it's because they see the MLB guys do it (even though they're 4-man or 6-man crews).

Anyone?
JJ