[CelticNHBlue]

To follow up on Mike's post, they have worked 4-umpire crews starting with Session 4 - Saturday evening (thanks for link, Mike).

I have had the priveledge to work 4-man a few times and like it. It takes some getting used to with the rotation. The trick we ran into was tag-up responsibilities when an umpire chases. This was a few years ago, prior to NCAA posting its mechanics for 3-man when noone chases, so we had to do it on the fly. Lots of communication and, luckily, no break-downs.