I saw Bochy talking about it on SportsCenter. I think they took it from the Giants postgame show. He said, and I am paraphrasing, that "I brought to the umpires attention, and none of them had seen it, and I told them I was going to protest the game. Then they made the call, but none of that would have mattered if we hadn't gotten the hits, blah, blah, blah." The bold is my emphasis. Bochy said none of them had seen it, which I find hard to believe. All four umps would make a call based on a manager saying so? More likely, one of them saw it, was fuzzy on the rule, and relayed what he saw to another ump who had not seen it, but was clear on the rule. As someone mentioned up above, I always thought the foul line was the cut-off point.