1: Auto racing, NASCAR Trucks, Truck Series 250, Martinsville, Va.
1: Men's college basketball, NCAA Division I semifinals, Indianapolis.
1: Race walking, IAAF, Grand Prix, Rio Major, Portugal.
1-2: Running, IAAF, World Cross Country Championships, Fukuoka, Japan.
1-9: Curling, Men's World Championships, Lowell, Mass.
2: Auto racing, NASCAR Nextel, TBA, Martinsville, Va.
2: Auto Racing, F1, Australian Grand Prix, Melbourne.
2: Auto racing, IRL, Honda Grand Prix, St. Petersburg, Fla.
2: Major League Baseball, opening day, Cleveland at Chicago White Sox.
2: Women's college basketball, NCAA Division I championship semifinals, Boston.
2: Cycling, ProTour, Ronde van Vlaanderen, Belgium.
3: Men's college basketball, NCAA Division I championship game, Indianapolis.
3-7: Cycling, ProTour, Basque Country Tour, Spain.
3-9: Women's tennis, Bausch & Lomb Championships, Amelia Island, Fla.
4: Women's college basketball, NCAA Division I championship game, Boston.
5: Cycling, ProTour, Gent-Wevelgem, Belgium.
5-9: Men's bowling, PBA Dexter Tournament of Champions, Uncasville, Conn.
5-9: Swimming, FINA World Championships (25-meter), Shangai, China.
6: Men's college ice hockey, NCAA Division I championship semifinals, Milwaukee.
6-9: Men's golf, PGA Tour, The Masters, Augusta, Ga.
6-9: Auto racing, NHRA, SummitRacing.com Nationals, Las Vegas.
7-8: Men's college gymnastics, NCAA championship, Norman, Okla.
7-9: Men's tennis, Davis Cup II, various sites.
8: Motorcycle racing, FIM, Qatar Grand Prix, Doha.
8: Men's college ice hockey, NCAA Division I championship game, Milwaukee.
8: Auto racing, Grand Am Rolex event, Long Beach, Calif.
8: Auto Racing, NASCAR Busch, O'Reilly 300, Fort Worth, Texas.
9: Auto racing, NASCAR Nextel, Fort Worth, Texas.
9: Auto racing, Champ Car, Toyota GP of Long Beach (Calif.)
9: Running, Paris Marathon.
9: Running, Rotterdam Marathon, Netherlands.
9: Cycling, ProTour, Paris-Roubaix, France.
10-16: Men's tennis, Open de Tenis Comunidad Valenciana, Valencia, Spain.
10-16: Men's tennis, U.S. Men's Clay Court Championships, Houston.
10-16: Women's tennis, Family Circle Cup, Charleston, S.C.
12-15: Wrestling, U.S. Championships, Las Vegas.
13-15: Women's college bowling, NCAA championship, Houston.
13-15: Women's golf, LPGA Takefugi Classic, Las Vegas.
13-16: Men's golf, PGA Tour, MCI Heritage, Hilton Head Island, S.C.
13-16: Men's golf, European PGA/Asian Tour, Volvo China Open, Beijing.
14-15: Track and field, Mt. Sac Relays, Walnut, Calif.
15: Auto Racing, NASCAR Busch, TBA, Lebanon, Tenn.
16: Amstel Gold Race, Netherlands.
17: Running, Boston Marathon.
17-23: Men's tennis, Masters Series, Monte Carlo.
18: Ice hockey, NHL Regular season ends.
19: Pro Basketball, NBA Regular season ends.
19: Cycling, ProTour, La Fleche Wallonne, Belgium.
20-22: Women's college gymnastics, NCAA championship, Corvallis, Ore.
20-23: Men's golf, PGA Tour, Shell Houston Open.
20-23: Men's golf, European PGA/Asian Tour, BMW Asian Open, Shanghai, China.
20-23: Men's golf, PGA Nationwide Tour, Athens (Ga.) Regional Foundation Classic.
20-23: Women's golf, Atlanta Charity Championship, Stockbridge, Ga.
21: Ice hockey, NHL Stanley Cup playoffs begin.
21: Auto Racing, NASCAR Busch, Basha's Supermarkets 200, Avondale, Ariz.
21-23: Diving, FINA Grand Prix, Zhuhai, China.
21-23: Men's golf, PGA Champions Tour, Liberty Mutual Legends of Golf, Savannah, Ga.
22: Auto racing, IRL, Indy Japan 300, Suzuka.
22: Pro Basketball, NBA Playoffs begin.
22: Auto racing, NASCAR Nextel, Subway Fresh 500, Avondale, Ariz.
22: Race walking, IAAF, Grand Prix, Kunshan, China.
22-23: Women's tennis, Fed Cup I, various sites.
23: Auto Racing, F1, San Marino Grand Prix, Imola, Italy.
23: Auto racing, Grand Am Rolex event, Danville, Va. 23: Running, London Marathon.
23: Cycling, ProTour, Liege-Bastogne-Liege, Belgium.
23-30: Boxing, National Golden Gloves, Omaha, Neb.
24-30: Men's tennis, Open SEAT Godo, Barcelona, Spain.
24-30: Men's tennis, Grand Prix Hassan II, Casablanca, Morocco.
24-May 1: Table Tennis, World Championships, Bremen, Germany.
25-30: Cycling, ProTour, Tour de Romandie, Switzerland.
27-29: Track and field, Penn Relays, Philadelphia.
27-29: Track and field, Drake Relays, Des Moines, Iowa.
27-30: Men's golf, PGA Nationwide Tour, BMW Charity Pro-Am, Greenville, S.C.
27-30: Men's golf, PGA Tour, Zurich Classic of New Orleans.
27-30: Women's golf, Ginn Clubs & Resorts Open, Orlando, Fla.
27-30: Men's golf, European PGA, Spanish Open, Cadiz.
27-30: Men's golf, Asian Tour, Maekyung Open, TBA, South Korea.
28-30: Auto racing, Argentine Rally.
28-30: Men's golf, PGA Champions Tour, FedEx Kinko's Classic Austin, Texas.
28-30: Auto racing, NHRA, Thunder Valley Nationals, Bristol, Tenn.
28-May 7: Badminton, Thomas/Ulber Cup Finals, TBA, Japan.
29: Track and field, IAAF Grand Prix, Dakar, Senegal.
29: Auto racing, NASCAR Trucks, Dodger Ram Tough 200, Madison, Ill.
29: Auto Racing, NASCAR Busch, Aaron's 312, Talladega, Ala.
29: Track and field, IAAF Grand Prix, Meeting du Conseil General, Fort de France, France.
29: Pro Basketball, NBA Draft early entry eligibility deadline.
29-30: Pro football, NFL draft, New York.
30: Motorcycle racing, FIM, Turkish Grand Prix, Istanbul.
30: Running, Madrid Marathon, Spain.
30: Auto racing, NASCAR Nextel, Aaron's 499, Talladega, Ala.
