England's Carl Mason has a one-stroke lead headed into the final round of the Senior British Open golf tournament in Turnberry, Scotland.

The 50-year-old Mason fired a five-under-par, 65 in his third round and is 14-under-par, 196 for three rounds. American D.A. Weibring is in second place at 13-under-par, 197 after shooting a 5-under-par, 65.

American veterans Tom Watson, Tom Kite and Bruce Summerhays are tied for third place, three strokes off the lead. All three golfers shot 4-under-par, 66 in the third round and are at 11-under-par, 199 for three rounds.