June 12 (Reuters) - Defending champion Bernhard Langer of Germany surged to a four-stroke lead after the second round at the Senior Players Championship in Massachusetts on Friday.
He shot a second consecutive six-under 65 on the Belmont Country Club course to leave the field in his wake in the third of the season's five major championships on the over-50s tour.
Langer posted a 12-under 130 halfway total, while American Russ Cochran also carded 65 to move into second place on eight under.
American Steve Pate fired a course-record 63 to vault into a tie for third, six shots behind Langer.