The history of sports is both vast and rich, thanks to the existence of so many different ones and the longevity associated with them. With so much history to cull through, Athlon Sports wanted to offer the opportunity to look back and see what memorable things happened or milestones were reached on a specific date.
With that in mind, May 20 is a day in which Robin Ventura accomplished a feat that no other MLB player in history has achieved and Scottie Pippen made a monster dunk on one of the best centers of all time.
1919: Boston Red Sox pitcher Babe Ruth won a game on the mound and hit his first career grand slam in a 6-4 win over the St. Louis Browns at Sportsman's Park.
1979: The Winnipeg Jets beat Wayne Gretzky and the Edmonton Oilers 7-3 at the Winnipeg Arena to win the AVCO Cup in six games. The AVCO Cup was the World Hockey Association's playoff championship trophy and the league folded and merged with the NHL after that season.
1988: Lane Frost became the first rider to stay on legendary bucking bull Red Rock for the eight-second qualifying time at the "Challenge of the Champions" in Redding, California. Bull riders had made 309 unsuccessful attempts to ride Red Rock before Frost successfully did so.
1990: Monica Seles beat Steffi Graf in two sets in the final of the Lufthansa Cup German Open in Berlin. Seles' victory snapped Graf's 66-match unbeaten streak.
1993: Chicago Bulls forward Scottie Pippen dunked on New York Knicks center Patrick Ewing and then taunted Spike Lee in a 93-79 win that evened the Eastern Conference Semifinals at 3-3. The victory was the last Bulls game at Chicago Stadium, as the team lost to the Knicks in Game 7.
1999: New York Mets third baseman Robin Ventura hit a grand slam in the first game of a doubleheader, an 11-10 win over the Milwaukee Brewers at Shea Stadium. In the second game, Ventura hit another grand slam in a 10-1 victory. To date, he is the only player in MLB history to record grand slams in both games of a doubleheader.
2000: Minnesota Timberwolves forward Malik Sealy was killed when his car was hit by a truck being driven down the wrong side of the highway by a drunk driver in St. Louis Park, Minnesota. Sealy had been driving home from a birthday party for teammate and best friend, Kevin Garnett. The Timberwolves honored Sealy by retiring his No. 2 jersey.
— Written by Aaron Tallent, who is part of the Athlon Contributor Network. Tallent is a writer whose articles have appeared in The Sweet Science, FOX Sports' Outkick the Coverage, Liberty Island and The Washington Post. Follow him on Twitter at @AaronTallent.