What an awful job by Matsui. He's not going to accomplish anything by leaving the bag, whether the ball is caught on a fly or not.
With that being said, the whole situation was set up by the awful call on the 1-1 pitch to Cano. Because it was 1-2 instead of 2-1, he was forced to swing at a pitcher's pitch. Unfortunate, but the beat goes on during this postseason.