•College football: The No. 10 OU vs. No. 19 Texas game at 2:30 p.m. Saturday on KOCO-5 (Brad Nessler, Paul Maguire, Bob Griese and Bonnie Bernstein) and Oklahoma State at Texas A&M at 6:30 p.m. Saturday on FSN (Joel Meyers, Dave Lapham and Jim Knox) tops a huge Saturday that includes four other matchups between top 25 teams: No. 9 Florida at No. 1 LSU at 7 p.m. on KWTV-9; No. 4 Ohio State at No. 23 Purdue at 7 p.m. on KOCO-5; No. 16 Virginia Tech at No. 22 Clemson at 5 p.m. on ESPN; and No. 25 Nebraska at No. 17 Missouri at 8:15 p.m. on ESPN. The showdowns begin tonight with No. 8 Kentucky at No. 11 South Carolina at 6:30 on ESPN. •NFL: KWTV-9 has the Sunday doubleheader with Jacksonville (2-1) at Kansas City (2-2) at noon and struggling San Diego (1-3) at Denver (2-2) at 3:15 p.m. Detroit (3-1) plays at Washington (1-2) at noon on KOKH-25. Surprising Green Bay (4-0) hosts Chicago (1-3) at 7 p.m. on KFOR-4. In the Monday night game, Dallas (4-0) plays at Buffalo (1-3) at 7:30 p.m. on ESPN. •Baseball: TBS has all the first-round games, including three today: Colorado at Philadelphia at 2 p.m., the New York Yankees at Cleveland at 5:30 and the Chicago Cubs at Arizona at 9.