April 30

1922 � Charlie Robertson of the Chicago White Sox pitches a 2-0 perfect game against the Detroit Tigers.

1961 � Willie Mays of the San Francisco Giants hits four home runs in a 14-4 victory over the Braves in Milwaukee.

1971 � The Milwaukee Bucks become the second team to register a four-game sweep in the NBA championship, beating the Baltimore Bullets 118-106.

1976 � Muhammad Ali wins a unanimous 15-round decision over Jimmy Young in Landover, Md., to retain his world heavyweight title.

1992 � The Red Wings and Canucks become the ninth and 10th teams in NHL history to rebound from 3-1 deficits to win playoff series. Detroit beats the Minnesota North Stars 5-2 in the Norris Division, while Vancouver defeats the Winnipeg Jets 5-0 in the Smythe Division.

1993 � Monica Seles, the top-ranked women's player, is stabbed in the back during a changeover at the Citizen Cup in Hamburg, Germany. Guenter Parche, 38, reaches over a courtside railing and sticks a knife into the back of Seles. She has an inch-deep slit between her shoulder blades and misses the remainder of the 1993 season.

2002 � Texas Rangers shortstop Alex Rodriguez becomes the second-youngest player to reach 250 homers during a 10-3 win over the Toronto Blue Jays.

2005 � James Toney outpoints John Ruiz to win the WBA heavyweight title in New York. Toney, a former champion at three other weights, wins his third heavyweight bout, becoming the third one-time middleweight champion to take boxing's top crown.