I'm with the ump. MLB says there is discretion on that play, but they didn't cite the rule-book page (or I didn't see it). You interfere with a fielder and you're out. Why should it be otherwise? Do we really want umpires huddling and deciding, well, I don't think it REALLY affected the play, whaddayou think, Fred? or 'Dunno, I think that throw mighta got him, mebbe not. Fred?'