Man on 1st no outs. Groundball to pitcher, pitcher throws to first for the out. The runner who was on first, rounds second and heads to third. As the 1st baseman throws to third (bad throw), the umpire behind shortstop, makes a bonehead decision to throw a returned foul ball to the umpire at home plate. Is it an automatic dead ball, or is it a judgement call on if the 2 balls rolling in different direction affectived the play??
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