1 — Major League Baseball, opening day.
1 — Auto racing, Formula I, Brazilian Grand Prix, Sao Paulo.
1 — Auto racing, NASCAR Winston Cup, Harrah's 500, Fort Worth, Texas.
1 — Women's college basketball, NCAA Division I Championship game, St. Louis.
1 — Motorcycle racing, World Superbike, Kyalami, South Africa.
1 — Running, Turin Marathon, Italy.
2 — Men's college basketball, NCAA Division I Championship game, Minneapolis.
2-8 — Figure skating, World Synchronized Championships, Helsinki, Finland.
2-8 — Ice hockey, Women's World Championship, Minneapolis and St. Paul, Minn.
2-8 — Women's tennis, WTA event, Porto, Portugal.
4-7 — Track and field, Texas Relays, Austin.
5 — Men's college ice hockey, NCAA Division I Championship semifinals, Albany, N.Y.
5-7 — Men's college gymnastics, NCAA Championships, Columbus, Ohio.
5-7 — Equestrian, Dressage World Cup, Sao Paulo, Brazil.
5-8 — Men's golf, PGA, Masters, Augusta, Ga.
5-8 — Auto racing, NHRA, Las Vegas Nationals.
6-8 — Men's tennis, Davis Cup, second round, various sites.
7 — Men's college ice hockey, NCAA Division I Championship game, Albany, N.Y.
7 — Auto racing, NASCAR Trucks, Martinsville, Va.
7 — Horse Racing, Grand National, Liverpool, England.
8 — Auto racing, CART, Toyota Grand Prix of Long Beach, Calif.
8 — Auto racing, IRL, Grand Prix of Miami, Homestead, Fla.
8 — Auto racing, NASCAR Winston Cup, Martinsville, Va.
8 — Running, Paris Marathon.
8 — Pro hockey, NHL regular season ends.
8 — Motorcycle racing, Japanese Grand Prix, Suzuka.
9-15 — Men's tennis, ATP, Grand Prix Hassan II, Casablanca, Morocco.
9-15 — Men's and women's tennis, ATP-WTA, Estoril Open, Portugal.
9-15 — Women's tennis, WTA, Bausch & Lomb Championships, Amelia Island, Fla.
11 — Pro hockey, NHL Stanley Cup playoffs begin.
12-14 — Wrestling, U.S. National Championships, Las Vegas.
12-15 — Men's golf, PGA, MCI Classic, Hilton Head Island, S.C.
12-15 — Men's golf, European PGA, Moroccan Open, TBA, Morocco.
12-15 — Women's golf, LPGA, City of Hope Classic, TBA.
12-15 — Men's golf, Japanese Tour, Tsuruya Open, Kawanishi.
12-16 — Equestrian, Show Jumping World Cup, Goteberg, Sweden.
13-15 — Men's golf, PGA Senior, The Countrywide Tradition, Scottsdale, Ariz.
14 — Auto racing, NASCAR Busch, Nashville, Tenn.
15 — Auto racing, Formula I, San Marino Grand Prix, Imola.
16 — Running, Boston Marathon.
16-22 — Men's tennis, ATP, Tennis Masters Series, Monte Carlo, Monaco.
16-22 — Women's tennis, WTA, Family Circle Cup, Charleston, S.C.
16-22 — Women's tennis, WTA, Budapest Open, Hungary.
18 — Pro Basketball, NBA regular season ends.
19-21 — Women's college gymnastics, NCAA Championships, Athens, Ga.
19-22 — Men's golf, PGA, Houston Open, The Woodlands, Texas.
19-22 — Men's golf, BUY.com, Arkansas Classic, Hot Springs, Ark.
19-22 — Men's golf, European PGA, Portuguese Open, Algarve.
19-22 — Women's golf, LPGA, Longs Drug Challenge, Lincoln, Calif.
19-22 — Men's golf, Japanese Tour, Asia-Pacific Open, Ina.
20-22 — Men's golf, PGA Senior, Las Vegas Senior Classic.
20-22 — Weightlifting, U.S. National Championships, Shreveport, La.
20-22 — Track and field, Mt.
Sac Relays, Walnut, Calif.
21 — Auto racing, NASCAR Busch, Talladega, Ala.
21 — Auto racing, Grand Am, Sun Automotive 200, Phoenix.
21 — Pro Basketball, NBA playoffs begin.
21-22 — Pro football, NFL Draft, New York.
22 — Auto racing, NASCAR Winston Cup, Talladega (Ala.) 500.
22 — Running, London Marathon.
22 — Running, Rotterdam Marathon, Netherlands.
22 — Motorcycle racing, World Superbike, Phillip Island, Australia.
22 — Motorcycle racing, South African Grand Prix, Welkorn.
23-29 — Men's tennis, ATP, Open Seat Godo, Barcelona, Spain.
23-29 — Men's tennis, ATP, Atlanta Tennis Challenge.
23-29 — Weightlifting, European Championships, Trencin, Slovakia.
23-May 5 — Table Tennis, World Championships, Osaka, Japan.
26-28 — Judo, U.S. Nationals, Orlando, Fla.
26-28 — Track and field, Penn Relays, Philadelphia.
26-29 — Men's golf, PGA, Greater Greensboro Classic, Greensboro, N.C.
26-29 — Men's golf, BUY.com, Pro-Am at the Cliffs, Greenville, S.C.
26-29 — Men's golf, European PGA, Spanish Open, Girona.
26-29 — Men's golf, Japanese Tour, Chunichi Crowns, Togo.
26-29 — Women's golf, LPGA, Harvey Penick Invitational, Austin, Texas.
27-28 — Track and field, Drake Relays, Des Moines, Iowa.
27-29 — Men's golf, PGA Senior, Bruno's Memorial Classic, Birmingham, Ala. 27-29 — Auto racing, NHRA event, Bristol, Tenn.
28 — Auto racing, IRL event, Hampton, Ga.
28 — Auto racing, NASCAR Busch, Auto Club 300, Fontana, Calif.
28 — Track and field, IAAF, Meeting du Conseil General Martinique, Fort de France, France.
28-29 — Women's tennis, Fed Cup, first round, various sites.
28-May 13 — Men's ice hockey, World Championships, Hanover, Cologne, Nueremberg, Germany.
29 — Auto racing, Formula I, Spanish Grand Prix, Barcelona.
29 — Auto racing, CART, Texas 600, Fort Worth.
29 — Auto racing, NASCAR Winston Cup, NAPA Auto Parts 500, Fontana, Calif.
29 — Motorcycle racing, World Superbike, Sugo, Japan.
29 — Running, Madrid Popular Marathon, Spain.
30-May 6 — Men's tennis, ATP, BMW Open, Munich, Germany.
30-May 6 — Men's tennis, ATP, Mallorca Open, Spain.
30-May 6 — Men's tennis, ATP event, Houston.
30-May 6 — Women's tennis, WTA, Betty Barclay Cup, Hamburg, Germany.
30-May 6 — Women's tennis, WTA, Croatian Bol Ladies Open, Bol, Croatia.