•Softball: FSN Southwest will air the first semifinal from the Big 12 softball championship at ASA Hall of Fame Stadium at 4:30 p.m. Saturday and the final at noon Sunday (Bill Land and Tracy Warren). ESPNU will announce the pairings for the 64-team NCAA Tournament at 9 p.m. Sunday. •Golf: The Players Championship, considered by some to be the fifth major, airs at noon today on the Golf Channel (Cox 60) and 1-6 p.m. Saturday and Sunday on KFOR-4 (Cox 3). The island 17th green is especially entertaining, and NBC will have 15 "Splash Mics” to capture the sound from errant shots. •NBA playoffs: TNT (Cox 31) will air Game 4 of the New Orleans-San Antonio series at 7 p.m. Sunday. KOCO-5 (Cox 8) will air Boston at Cleveland at 7 p.m. Saturday and the L.A. Lakers at Utah at 2:30 p.m. Sunday. •Baseball: Network games include Arizona at the Cubs at 2:30 p.m. Saturday on KOKH-25 (Cox 12), the Yankees at Detroit at noon Sunday on TBS and Boston at Minnesota at 7 p.m. Sunday and 6 p.m. Monday on ESPN (Cox 29). •Auto racing: The NASCAR Sprint Cup Series has another night race with the Dodge Challenger 500 at 6 p.m. Saturday on KOKH-25.