Riley shot 63 today to move to 11-under 129 and claim a share of the lead with Ryan Moore during an incomplete second round at the PGA Tour's final event before the playoffs.
Moore was at 11-under through 17 holes and Jeff Maggert was at 10-under with one hole remaining when play was halted shortly after 8 p.m. because of darkness. Tournament organizers continue to play catch-up after Thursday's four-hour weather delay.
Sergio Garcia had two eagles during his 64, and he joined first-round leader Bill Haas (69) and Chez Reavie two strokes back at 131.
Augusta native Charles Howell (67) is at 135. Evans resident Vaughn Taylor (70) is at 137.