[AtlUmpSteve]

The original post asks if PU should over-rule the BU. Not only he should not, there is no rules basis to support that he could. No matter how bad the original call is, you can't violate a different rule in the name of trying to fix the wrong. Whether judgment or poor rule knowledge or interpretation. No umpire has the authority to over-rule the calling umpire.

Interestingly (and perhaps intentionally), the fictitious play is one where both umpires have authority to make the call. But PU did not make the obvious call, so he waived his right to now assert he can make it. If PU did his job, he would have had the DDB signal, and at the end of the play conferenced with BU to determine the award. He just wants to get a bad call fixed? In this case, look in the mirror.