SAN ANTONIO – Oklahoma State defender Carson Michalowski headed in a corner kick from Colleen Dougherty in the 53rd minute Sunday and the Cowgirls defeated Texas A&M 1-0 to win the Big 12 Conference women's soccer championship.

The fifth-seeded Cowgirls (15-7-0, 8-5-0) earned the automatic bid into the NCAA tournament, which starts Friday.

The second-seeded Aggies (14-6-2, 8-3-2) will learn their fate Monday when the selections are announced at 7 p.m. Texas A&M entered the Big 12 tournament ranked 20th nationally.

It

s the first time the Cowgirls have won the Big 12 tournament since 2003. It's the 10th shutout of the season for Oklahoma State and its freshman goalkeeper Adrianna Franch, which is a single-season school record.

The Aggies were victorious in 2004 and 2005. They were the runner-up in 2007.