先说，波西条款是有标准的，
知道要怎么判的。可不是自由心证。
条款规则就是
Unless the catcher is in possession of the ball, the catcher cannot block the
pathway of the runner as he is attempting to score. If, in the judgment of
the Umpire, the catcher, without possession of the ball, blocks the pathway
of the runner, the Umpire shall call or signal the runner safe
意思就是要持球，才能进入跑者路线。
没有持球，不能进入跑者路线。
所谓的跑者路线是指，
"the pathway of the runner as he is attempting to score"
那球捕手接球前整个身体包含脚跟手都在本垒板的一垒侧。
这是阻挡在哪。
乐天回本垒要跑到一垒侧逆!
来，解释给我听听看阿。