Walk Off City

How many teams have won two non-doubleheader games in one day on walkoffs?

Matthew Kory exclaims:

I turned the game off after Dempster gave up the grand slam. It was over. The Sox were done for the night and so was I. Except, as it turned out, neither of us were. I called up the score on my phone hours later. "They WON!" I yelled. My wife came running. "What?" she said. I grinned. I couldn't help it.