STILLWATER, Okla. — Oregon's Norman Xiong fell down the leaderboard during Saturday's second round of the NCAA Men's Golf Championships at Karsten Creek.

Xiong, who opened the tournament with a 68 and was one shot off the lead after the first round, shot a 2-over 74 Saturday and is tied for 19th place with three others a 2-under 142 for the tournament.

The top 15 teams and top nine individuals not on advancing teams after Sunday's third round advance to Monday when the team field will be trimmed to eight and the individual championship will be decided.

Auburn's Brandon Mancheno took the individual lead as he shot a 66 Saturday after a 72 in the first round for a 6-under 138, one shot ahead of seven other golfers, including Arizona State's Chun An Yu.

Xiong is one shot out of the top 13 and two shots out of the top 10.

The Ducks also have had their struggles in the team race as they're in 28th place in the 30-team field at 20-over 596 after shooting a 300 on Saturday.

Texas Tech leads the team standings at 5-under 571, one shot ahead of second-place Oklahoma State and two shots ahead of third-place Alabama. The top Pac-12 team is Arizona State, which is tied with three other teams for 13th place at 9-over.

Edwin Yi had Oregon's best round Saturday with a 72 to move into a tie for 59th at 3-over 147. Oregon's Donald Kay is tied for 100th at 8-over 152.