Texas A&M second baseman Scott Arthur, left, forces out Kansas' Dakota Smith, right, on a fielder's choice hit by Jake Marasco in the seventh inning of a Big 12 conference tournament baseball game in Oklahoma City on Wednesday, May 23, 2012. Texas A&M won, 10-4.

Texas A&M second baseman Scott Arthur went 2-for-4 with a career-high three RBIs, while Tyler Naquin collected four hits as the sixth-ranked Aggies downed Kansas, 10-4, in the first round of the Big 12 Baseball Championship on Wednesday at Chickasaw Bricktown Ballpark.

Kansas sophomore pitcher Frank Duncan set a pair of milestones in defeat. The righty recorded eight strikeouts, which tied for the most by a Kansas pitcher in a Big 12 tournament game, matching Kodiak Quick’s total in a 2005 game against Baylor. Duncan also reached 100 strikeouts for the season, making him the fifth KU pitcher to collect 100-plus K’s and the first since 2005.

And he dominated at times, retiring 11 straight — including six straight strikeouts — after surrendering an RBI single in the first.

But A&M scored four runs in the fifth and two in the sixth to pull away.

“With our team being so young it has been a struggle this year obviously, but for us to keep grinding and to even get here for the Big 12 Championship was a step in the right direction and a big step for the guys on our team since we are so young,” said Duncan, who was touched for a season-high seven runs off 10 hits over 52?3 innings.

The Jayhawks rallied for three runs in the ninth inning, when freshmen outfielders Dakota Smith and Michael Suiter collected RBI hits, while Tucker Tharp added a sacrifice fly. Tharp, Suiter and second baseman Jordan Dreiling each collected two hits, while four players collected RBIs.

Kansas (22-33) will face Texas at 12:30 p.m. today in an elimination game.

UT fell to Missouri, 5-0, on Wednesday.

In other first-round Big 12 games Wednesday, Baylor routed Kansas State, 11-1, and Oklahoma slipped past rival Oklahoma State, 1-0.