When Rickey Henderson was on the Mets a few years back, he was thrown out trying to steal second base one afternoon in Pittsburgh. As he trotted off the field the organist played "Old Gray Mare." I started humming along, but it wasn't until about twenty minutes later that I realized what I was humming. Man, an organist with a sense of humor is a beautiful thing. Acclaimed baseball writer Alan Schwarz conducted a brief Q & A with the old gray mare in yesterday's Times magazine. There isn't a great Rickeyism to be found, but still, it is mildly amusing.