Robert Karlsson and Kevin Stadler topped the OHL Classic leaderboard at 12 under Friday when second-round play was suspended because of darkness.
Karlsson completed an 8-under 63 in the rain-delayed first round and added a 67 in the afternoon on Mayakoba Resort's El Camaleon course. The Swede tied for 10th on Sunday in the McGladrey Classic, playing on a sponsor exemption, to earn a spot in the field this week.
Stadler had rounds of 67 and 63. He birdied five of the last seven holes in the second round.
Karlsson finished with a birdie on the par-4 18th after making bogeys on 16 and 17.