On April 23, 1999, third baseman Fernando Tatis of the St. Louis Cardinals made history by becoming the first player in major league history to hit two grand slams in one inning. Tatis hit two grand slams off Dodgers starter Chan Ho Park in the third inning in a 12-5 St. Louis win at Los Angeles. Before Tatis' big inning, only nine other players had hit two grand slams in one game.
On July 12, 1999, the National League's Mark McGwire hit 13 homeruns in 1 round of the All Star Homerun Derby to set a new record but went on to lose to the American League's Ken Griffey, Jr.
On July 18, 1999, David Cone of the New York Yankees pitched a perfect game in a 6-0 win against the Montreal Expos.
On August 6, 1999, San Diego Padres outfielder Tony Gwynn added his name to the exclusive 3,000 hit list with a first-inning single against the Montreal Expos.
On August 7, 1999, Wade Boggs of the Tampa Bay Devil Rays also collected his 3,000th hit. Boggs hit a homerun against the Cleveland Indians to become the first player to make a 3,000th hit a homerun.
For the first time since 1996, Ken Griffey, Jr. of the Seattle Mariners does not reach the 50 homerun barrier
as he ends with 48.
Mark McGwire of the St. Louis Cardinals and Sammy Sosa of the Chicago Cubs are almost able to recreate the same excitement from the 1998 season. They are once again engaged in a homerun race. For the second season, both men crushed the previous record from 1961. Neither man is able to reach McGwire's new record of 70 created in 1998. Sosa ends the season with 63 and McGwire with 65.
Mike Piazza of the New York Mets hits 40 homeruns for the second time in his career, 1 away from tying the single season catcher record.
Manny Ramirez of the Cleaveland Indians is able to gather up 165 RBI's by the end of the 1999 season. This is the largest total of RBI's since Jimmie Foxx had 175 in 1938.
For the second consecutive season, Larry Walker of the Colorado Rockies wins the National League batting crown with a .379 batting average.
The 98-64 New York Yankees won the World Series for the second consecutive season and for the 25th time in the 20th century.
