Batting second and playing center field on April 17, 1961, early in the regular season, he hit a game-winning home run into the Fenway Park right field bullpen in the 7th inning of a 3-2 Boston win over the Angels. But then he dropped a fly ball hit by Brooks Robinson with two outs in the 9th inning of a 5–4 Red Sox loss to the Baltimore Orioles on May 27. It should have been an easy catch, but Geiger bobbled it when he and two other Red Sox players tried to glove it. The error was the first by Boston in ten games. He had accounted for a Red Sox run in the 5th by doubling and scoring on a single by Wertz.