Stephen Ames sits 2 shots back of Senior British Open leader K.J. Choi at Carnoustie

K.J. Choi of South Korea has a two-shot lead over Vancouver resident Stephen Ames at the Senior British Open after carding a second consecutive 3-under 69 Friday in Scotland.

Choi surged ahead after he eagled the par-5 12th hole and had a 36-hole total of 6-under 138 at Carnoustie.

"Today's iron shots were better than yesterday and still inside six, seven foot; the putter, reading is very difficult," Choi said. "Couple of mistakes on some shots and couple of mistakes with the putter but still scored the same as yesterday."

Overnight leader Ames was Choi's nearest chaser going into the weekend. The naturalized Canadian citizen from Trinidad shot par for the day.

Australia's Richard Green (72) and Irishman Padraig Harrington (70) were three strokes off the lead.

Harrington was well placed to become the fifth man to win the British Open and Senior British Open.

"We've only played 36 holes. Feels like we've done 72," Harrington said.

"Been a tough 36 holes with that weather and wind and you've got to all be on, and I'm sure it's going to be another 36 of tough mental fortitude to come."

WATCH | Ames secures Mitsubishi Electric Classic title in April:

Vancouver's Stephen Ames celebrates 60th birthday by successfully defending Mitsubishi Electric Classic title

9 months ago

Duration 3:37

Vancouver's Stephen Ames made two eagles and closed his round with a long birdie putt, as he won the PGA Tour Champions Mitsubishi Electric Classic for the second year in a row, and third time in his career.