Walk on a Passed Ball with R3 coming home

[Mad Mike]

OBR Rule Set: R3, 1 out, 3-2 count. Passed ball for ball 4. Pitcher coming to cover home, batter-runner delays running to first slightly. R3 coming home. Slight contact between BR and Pitcher. Pitcher unable to get the out at home. The calling umpire told me he did not believe the BR intentionally ran into the pitcher. Would you call interference on this play? Would it make a difference if the pitcher was in the act of fielding a thrown ball from the catcher, or if he was not yet fielding a throw from the catcher?

[noumpere]

This is "int with a thrown ball".  Must be intentional.  And, while "willful indifference" could apply, it seems unlikely from your description.

[Replacematt]

If anything, there might be OBS. Probably not, unless you feel he could have made 2B.