(Reuters) - Mark Wiebe clinched the British Senior Open Championship at Royal Birkdale on Monday after winning a playoff against Bernhard Langer, who had blown a two-shot lead on the final hole on Sunday before bad light stopped play. Langer missed putts on the 72nd hole and the first two playoff holes before the pair returned early on Monday, needing a further four holes of sudden death before the German missed a six-foot par putt at Birkdale's famous 18th to make American Wiebe the champion. ... More...