(Reuters) - Mark Calcavecchia and Joe Daley wrestled the lead away from Fred Couples after Saturday's third round of the year's third major for over-50s, the Senior Players Championship at Fox Chapel Golf Club in Pittsburgh. Former British Open champion Calcavecchia fired a six-under 64 for a 12-under total of 198 to tie with Daley (68), one shot clear of second-round leader Couples (70) and Tom Lehman (66). Calcavecchia carded three birdies on each half while defending champion Couples cancelled out his three birdies with as many bogeys. ... More...