Ten memorable athlete "unretirements"

Michael Jordan

Retired: 1993, 1998, 2003

On March 18, 1995 -- 20 years ago! -- Michael Jordan and the Bulls announced that he would rejoin the team and play in the following day's nationally televised game against the Pacers.

Jordan went 7-for-28 from the field, scoring 19 points, dishing out six assists and grabbing six rebounds. He would go on to lead Chicago to three additional championships (1996-98) as well as an NBA-record 72 regular-season wins in the 1995-96 season.

Here are other notable athletes who called it quits only to come back to give their sport another go:

Lance Armstrong

Retired: 2005, 2011

Armstrong retired in 2005 after a record seventh consecutive Tour de France victory, though it would eventually be stripped because of his steroid scandal. On Sept. 9, 2008 he announced he would return, but would never finish first again (he finished third and 23rd in the 2009 and 2010 Tour de France races). Armstrong left the cycling world again in 2011 while facing a federal investigation into doping allegations.

Roger Clemens

Retired: 2003, 2006, 2007

"The Rocket" retired from the big leagues a few times. He first retired in 2003 after six Cy Young Awards and one World Series win with the New York Yankees. Clemens came back in 2004 to play for the Houston Astros and captured his seventh Cy Young. In 2006, he retired again before returning again for another stint with the Yankees. Clemens would finally hang up the cleats for good in 2007, at the age of 45.

Brett Favre

Retired: 2008, 2009, 2011

It probably isn't easy for any player to give up playing their respective sport, but it seemed especially hard for Favre. No. 4 formally retired in 2008 only to come back a few months later. But the Green Bay Packers were ready to move on with quarterback Aaron Rodgers, so they traded Favre to the New York Jets that year. He played for one season before retiring again on Feb. 11, 2009. But Favre wasn't done yet. The winningest quarterback in NFL history came out of retirement again a few months later to play for the Minnesota Vikings until finally retiring for good in 2011.

George Foreman

Retired: 1977, 1997

Foreman came back 10 years after his retirement in 1977 at the age of 38. In 1994, nearly two decades after he last held a title, Foreman beat Michael Moorer for the WBA, IBA and lineal heavyweight championships. This made Foreman a rather improbable champion at the age of 45.

Magic Johnson

Retired: 1991, 1996

Johnson's circumstances are unique among the athletes on this list. Before the 1991-1992 NBA season, he found out he tested positive for HIV and announced in a news conference that he would retire immediately. In 2011, Johnson told Los Angeles Times columnist Bill Plaschke, "If I knew what I know now, I wouldn't have retired," referring to the misconception at that time that he could spread the disease through minor contact. In 1995, at the age of 36, Johnson returned to the Lakers and averaged 14.6 points, 6.9 assists and 5.7 rebounds per game before retiring permanently after that season.

Mario Lemieux

Retired: 1997, 2006

Super Mario retired from the Penguins after the 1997 NHL playoffs but returned to the ice in 2000 and won a gold medal with Team Canada at the 2002 Winter Olympics. Then, after several health setbacks and the cancellation of the 2005 season, Lemieux retired for good in 2006.

Michael Phelps

Retired: 2012

After the 2012 Olympics in London, the most decorated athlete in Olympics history took a break from the pool and retired from swimming. The 22-time Olympic medalist came back in 2014 with plenty of time to prepare for the 2016 Olympics in Rio de Janeiro.

Deion Sanders

Retired: 2001, 2005

Sanders, who lived up to his "Prime Time" nickname during his several successful seasons with the Cowboys, retired in 2001 after a one-year stint with the Washington Redskins. In 2004, Sanders returned to the gridiron after signing a one-year deal with the Baltimore Ravens. That season, Sanders recorded five interceptions before retiring again.

Ricky Williams

Retired: 2004, 2012

Facing a four-game suspension in 2004 for violating the NFL's drug policy, Williams shockingly announced his retirement. He returned in 2005, then left to spend a season in the Canadian Football League in 2006. Williams found his way back into the NFL in 2007 to play for his former team, the Miami Dolphins, until 2010. In 2011, Williams played for the Ravens before officially calling it a career again. Despite bouncing around a few times, Williams tallied 10,009 yards and 74 rushing touchdowns in 11 NFL seasons.