[5] Beasley's mother Fatima Smith and his four siblings (two brothers and two sisters)[6] moved from nearby Montgomery County to Frederick in 2005 and lived there for one year.

[4] While growing up, Beasley played for one of the country's most successful AAU youth teams at the time, the PG Jaguars.

Beasley won multiple national championships with this team alongside future fellow blue-chip recruits Kevin Durant (Texas)[7] and Chris Braswell (Charlotte).

[6] In 2006, Beasley was a second-team Parade All-American and was also named to the 2006 USA Men's U18 National Team member on June 26, 2006.

10 Texas, 58–48 on March 6, 2004), the first time K-State beat Kansas in Manhattan since 1983 and the first-ever victory against the Jayhawks in Bramlage Coliseum.

The win partially backed up a boast he had made before the season about K-State's prospects against the Jayhawks: We're going to beat Kansas at home.

[15]On March 1, 2008, his boast did not come true, as Kansas won the return match in Lawrence, 88–74 despite 39 points and 11 rebounds from Beasley.

Beasley led the Wildcats to a 10–6 record in conference play, earning a number 3 seed in the 2008 Big 12 men's basketball tournament at the Sprint Center in Kansas City, Missouri.

[20] Beasley is one of just two players in Kansas State history to earn first team All-America honors from the Associated Press.

Beasley was named National Freshman of the Year by CBS Sports.com, Rivals.com, The Sporting News, and the U.S. Basketball Writers Association (USBWA).

[23] In his NBA Summer League debut on July 7, Beasley scored 28 points and grabbed 9 rebounds (and had 2 assists[24]) in 23 minutes played.

After the Heat's first round exit from the 2009 playoffs, it was reported that Beasley, along with fellow rookie Mario Chalmers, had been fined multiple times throughout the season for violations of team policy.

Beasley was traded in order to clear salary cap space for Miami, allowing them to sign free agents LeBron James and Chris Bosh, as well as re-sign Dwyane Wade.

[46] Around this time, he decided to train with former two-time NBA champion point guard Norm Nixon in order to improve his game.

In a November 7, 2012, game against the Charlotte Bobcats, Beasley scored 21 points, grabbed 15 rebounds, and had 7 assists to help the Suns win 117–110.

On January 30, 2013, Beasley scored a season-high 27 points with 6 rebounds and 5 steals off the bench to lead the Suns to a 92–86 victory against the Los Angeles Lakers.

Lon Babby, the Suns' president of basketball operations, said, "We worked hard to devote ourselves to Michael's success, but we have to maintain the standards to build a championship culture.

[54] Despite averaging 28.6 points, 10.4 rebounds, 5.2 assists and 1.9 steals in 37 games, Beasley could not lead the Sharks to the CBA playoffs as they finished 12th with a 17–21 record.

[59] On June 28, 2015, the Heat declined to pick up their $1.3 million team option on Beasley's 2015–16 contract, making him a free agent.

[60] On September 30, 2015, Beasley signed with the Shandong Golden Stars for the 2015–16 CBA season, returning to China for a second stint.

[63] On January 17, 2016, he won the CBA All-Star Game MVP award for the second straight year after recording 63 points, 19 rebounds and 13 assists for the South team.

[71] Beasley helped the Rockets finish the regular season as the eighth seed in the Western Conference with a 41–41 record.

[76] On March 31, 2017, he returned after missing 17 games with a hyperextended left knee, scoring seven points in eight minutes in a 108–105 win over the Detroit Pistons.

[78] On November 25, 2017, he had a season-high 30 points starting in place of the injured Kristaps Porziņģis in a 117–102 loss to the Houston Rockets.

[79] On December 16, 2017, once again starting in place of Porziņģis, Beasley tied his season high with 30 points in a 111–96 win over the Oklahoma City Thunder.

Beasley became the first NBA player since starts were recorded in the 1970–71 season to come off the bench and have at least 32 points and 12 rebounds while playing 25 minutes or fewer.

[85] On February 7, 2019, Beasley and Ivica Zubac were traded to the Los Angeles Clippers in exchange for Mike Muscala.

[85][96] He has two brothers, Leroy Ellison and Malik Smith, and two younger sisters, Mychaela Beasley and Tiffany Couch.

[107][108][109] On August 24, 2009, Beasley reportedly checked into a Houston rehab center, just days after he posted pictures of himself on Twitter with what some have speculated to be marijuana in the background.

[116] On February 9, 2025, Beasley was arrested by the Riley County Police Department for attempting to board an airplane at Manhattan Regional Airport with six grams of marijuana.