The U.S. Senior Open in St. Louis was postponed this morning due to rain. Peter Jacobsen was the leader after the first round, shooting a six-under 65. Three months ago Jacobsen could barely walk after undergoing hip surgery. Craig Stadler was just a stroke behind at five-under. St. Louisan Hale Irwin shot an even-par 71 and Kansas City native Tom Watson was three-over. Arnold Palmer shot a 12-over 83.