AUTO RACING
NASCAR, Sprint Cup, practice and qualifying for Auto Club 400, 3 p.m., 7 p.m., SPEED-TV
NASCAR, Sprint Cup, Nationwide Series, final practice for Royal Purple 300, 4:30 p.m. SPEED-TV
Formula One, qualifying for Malaysia Grand Prix, 4 a.m., SPEED-TV
BASKETBALL, MEN
NCAA Regional Semifinals
BAYLOR vs. XAVIER, KENTUCKY vs. INDIANA, 7 p.m., CBS-TV, WZON Bangor (620 AM) radio
NORTH CAROLINA vs. OHIO, NC STATE vs. KANSAS, 7:47 p.m., TBS-TV
BASKETBALL, NBA
BOSTON at PHILADELPHIA, 8 p.m., ESPN-TV, WZON Bangor (620 AM) radio, joined in progress
DENVER at UTAH, 10:30 p.m., ESPN-TV
BOXING
Junior middleweights, Antwone Smith vs. Robert Garcia, 9 p.m., ESPN2-TV
Junior welterweights, Yordenis Ugas vs. Johnny Garcia; super featherweights, Diego Magdaleno vs. Miguel Beltran, 11 p.m., Showtime-TV
GOLF
European PGA Tour, Trophee Hassan II, 11 a.m., The Golf Channel-TV
Champions Tour, Mississippi Gulf Resort Classic, 12:30 p.m., The Golf Channel-TV
PGA Tour, Arnold Palmer Invitational, 3 p.m., The Golf Channel-TV
LPGA Tour, Kia Classic, 6:30 p.m., The Golf Channel-TV
SOCCER
MLS: HOUSTON at SEATTLE, 10 p.m., NBCSN-TV