Chad Campbell reached the clubhouse at 4 under and currently has sole possession of the lead at the RBC Canadian Open. With the afternoon wave getting under way at Shaughnessy Golf and Country Club, here are some things to keep an eye on today during the Golf Channel’s coverage of second round action. • Of the 17 players currently under par at Shaughnessy, 13 are playing this afternoon. • Ernie Els, who hasn’t posted a top 10 on TOUR this season, opened with a 2 under 68 yesterday. He will tee off with Masters champion Charl Schwartzel and Paul Casey at 3:40 p.m. • Our Featured Group of Rickie Fowler, Lucas Glover and Anthony Kim is set to go off the 10th tee at 3:50 p.m. ET. The trio posted identical 1-under 69s during Thursday’s opening round. • Matt McQuillan looks like he will be Canada’s best hope at winning its national championship for the first time since 1954. One of four Canadians inside the top 30 on the leaderboard, McQuillan is the only one in red numbers. He will try to back Thursday’s 68 at 5 p.m. ET when he tees off on No. 10. • 21-year-old Bud Cauley is 3-for-3 in cuts made since turning pro at the U.S. Open with finishes of T63, T24 and T4. He enters Round 2 at 1 under, just three shots off the lead. Playing with Cauley is David Hearn, who at even par, is the second-best Canadian on the leaderboard at the moment.