Bradley Dredge chipped in twice to shoot 67 at Carnoustie yesterday and lead by three strokes after the second round of the Dunhill Links.
First-round pacesetter and European Order or Merit leader Paul Casey double-bogeyed the last hole on the Old Course at St. Andrews for a 74 and a share of 11th place.
Three courses are being used for this pro-am event, the third being Kingsbarns, arguably the easiest and where Dredge will play his third round on Saturday.
Dredge, who had a course-record 64 at St. Andrews on Thursday, chipped in for birdies at his first two holes Friday and had three more to offset his only bogey at No. 6.
"I hit some really good shots at the start," Dredge said. " Then I hit some iffy shots, but I scrambled well when I had to. Carnoustie is tough, but you can see more of the trouble here."
Simon Dyson (Kingsbarns) shot a 68 to share second place with Charl Schwartzel (67 at St. Andrews) and Johan Edfors (70 at St. Andrews).
Padraig Harrington (69) and Vijay Singh (70) are a further shot back to be tied for fifth with Scott Drummond and Mikko Ilonen, who hit 69s at Carnoustie.
Defending champion Colin Montgomerie, paired again with actor Michael Douglas as his amateur partner, shot 67 on the Old Course to share 36th spot.
The 22-year-old Schwartzel had a brilliant round on the Old Course. "I didn't have a bogey or a five on my card," he said. "I hit 17 greens yesterday and probably the same today."
Edfors shared the lead until he bogeyed the 16th and double-bogeyed the Road Hole 17th after hitting the famous greenside bunker. "I got a bit greedy and went for the flag," he said.
Casey remained upbeat despite his disappointing day. "Everything went well yesterday and everything that could go against me today, went against me," he said. "I didn't make any putts and didn't really hit the ball particularly well.
"I couldn't get any momentum. I started well, but I wasn't controlling the golf ball particularly well and it finally caught up with me."
Ernie Els is in a group sharing ninth spot after a 67 on the Old Course. "My iron play could be a little better," he said. "If I get that sorted out I should be OK."Reuse content