American Harris English will be hoping to turn back the clock when he takes a one-shot lead into Sunday at the rain-marred Mayakoba Golf Classic in Mexico.
English fired a superb second round of seven-under 64 on Saturday to follow a first round 65 carded on Friday, a day after Thursday's washout, leaving him at 13 under par through two rounds.
Graeme McDowell stands at five under after he carded a 71.
Players will be grouped in threes for the third round and regrouped after it is completed. Organisers are hoping to finish the tournament on Sunday, but if necessary play will resume early on Monday morning.
The 30-year-old English won this tournament in 2014 - and hasn't won since.
He heads into Sunday leading by the barest margin from countryman Vaughn Taylor, who had a 66 on Saturday to lie one stroke ahead of another American, Brendon Todd, who shot 68.
New Zealand's Danny Lee sits next on 10-under following a Saturday 70.
English said he was looking to parlay his early-season momentum into his third career win on the PGA Tour.
"I think I missed two greens today," he said after chipping in for birdie on the 18th. "And if you do that every day out here, you're going to take it deep."