| March 21 |
| 1946 |
Date of the first Mexican League game. |
| 1953 |
Boston's Bob Cousy scored 50 points, including 25 in overtime, as the Celtics outlasted Syracuse, 111-105 in four overtimes to eliminate the Nationals in the Eastern Division Semifinals. |
| 1968 |
Kansas City, rewarded with an American League franchise, nicknamed themselves the Royals. |
| 1975 |
Georgia Tech blasted Earklham, 41-0, the largest margin of victory in NCAA history. |
| 1986 |
America's Debi Thomas, a pre-med student at Stanford, dethroned Katarina Witt in the world figure skating championships at Geneva. |
| 1994 |
Michael Jordan was cut from the White Sox roster and sent to their minor league club. |
| 2001 |
Rick Pitino was named the new head basketball coach at Louisville. He replaced Denny Crum. |
| 2003 |
The St. Louis Rams acquired OT Kyle Turley from the New Orleans Saints in exchange for a second-round pick in the 2004 NFL Draft. |
| 2004 |
Formula One's Michael Schumacher made it 2-for-2 on the season with a victory in the Malaysian Grand Prix. The victory was the six-time champion's third Malaysian GP win and 72nd of his F1 career. |
| 2004 |
Philadelphia's Veteran Stadium was imploded. The demolition took about 62 seconds and more than 3,000 pounds of explosives. |
| 2005 |
The Cleveland Cavaliers fired head coach Paul Silas. |
| 2005 |
The NFL will play a regular-season game outside of the United States for the first time in the league's 86-year history in October when the Arizona Cardinals meet the San Francisco 49ers in Mexico City. |
| 2006 |
The Indianapolis Colts signed K Adam Vinatieri. |
| 2006 |
The Los Angeles Kings fired head coach Andy Murray. |
| 2006 |
Iowa State named Greg McDermott its new men's basketball coach. |
| 2008 |
In the NCAA college basketball tournament two 13th seed teams won first round games. San Diego defeated Connecticut 70-69 OT and Siena defeated Vanderbilt 83-62. |
| 2008 |
The Atlanta Falcons signed K Jason Elam to a four-year contract. |
| 2010 |
Minnesota Twins closer Joe Nathan had reconstructive elbow surgery and would miss the 2010 season. |
| 2010 |
The Minnesota Twins re-signed C Joe Mauer to an eight-year contract extension worth $184 million. |
| 2011 |
Tennessee fired basketball coach Bruce Pearl. |
| 2012 |
The NFL handed down suspensions in "bounty gate". Saints coach Sean Payton was suspended 1 year, former defensive coordinator Gregg Williams received an indefinite suspension, while GM Mickey Loomis was suspended 8 games. The team was also fined $500,000 and lost a second- round pick in each of the next two years. |
| 2012 |
The Denver Broncos traded QB Tim Tebow and a seventh-round draft pick to the New York Jets for a fourth and sixth-round picks. |
| 2012 |
The San Francisco 49ers re-signed QB Alex Smith to a three-year contract. |