[AtlUmpSteve]

Like most others, I believe that PU, if he sees what he believes is unmistakably a violation, he needs to call it immediately. Only if working with a very experienced partner who obviously is looking at it and judging something different should the PU defer to the BU in this case. Bluntly, the defense is entitled to enforcement of the rule, if it has been violated.

This is basically the same as calling what you see as an obvious interference when BU doesn't; defer to the experienced partner that obviously sees it and judges otherwise, but make the call if your partner freezes or clearly misses it. And do it with only the slightest hesitation (for the BU to make the call), so it doesn't appear like the opposing coaches talked you into it.

The delayed call is obviously an issue; as mentioned, no one sees the violation after the delay, while they may well if called timely and immediately. And, when (not if) the OC asks you go to your partner for the "different angle", you can find out if BU had a reason for a no call (and you can reverse if necessary), or simply blew the mechanic and didn't see it. (While you mention that YOU have lead, HE has trail; and not to turn his back until everyone is clearly stopped on a base with ball controlled by F1 in circle!!)