#1 There are runners at 1st and 2nd with no outs. A ground ball is hit to the SS who flips it to 2nd to get the force there. The 2b throws the runner out at 1st. The runner who started the play on 2nd inexplicably does not move from the bag at 2nd. This runner was not tagged, simply stayed on 2nd. The defense thought this runner should be out, but the umpire ruled that once the force at 3rd was alleviated by putting out the runner going from 1st to 2nd, the runner that started at 2nd didn't have to go anywhere. Not knowing this rule for sure, the umps explanation made sense. I'm just not sure if it is right.