A Poem by May Swenson By Robert Hass September 13, 1998 When Mark McGwire was taking his victory lap the other night, half dancing and half jogging around the bases after hitting his 62nd home run of the season, my companion, who takes a quizzical philosophical interest in the bodies of baseball players, murmured, When Body, my good bright dog . . . She was quoting May Swenson, a wonderful and ...