As of 2020, Mario Chalmers is a  professional basketball player for Aris of the Greek Basket League. He was selected with the 34th overall pick in the 2008 NBA draft by the Minnesota Timberwolves after playing three seasons of college basketball for the University of Kansas, including being a part of the 2007–08 national championship team. 

Chalmers is most notable for winning NBA titles with the Miami Heat in 2012 and 2013. He was highly praised for his 25-point performance in Game 4 of the 2012 NBA Finals. He scored 12 points in the fourth quarter to help the Heat win the game. In Game 5 of the NBA Finals, Chalmers recorded 10 points, 7 assists and 2 rebounds in 34 minutes of action as he helped the Heat win the 2012 NBA championship, his first. He won his second championship on June 20, as the Heat defeated the Spurs to conclude an intense seven game series. Chalmers would bounce around the league for the next five years before making the move to play basketball in Europe.

Chalmers is the founder of the Mario V. Chalmers Foundation, which supports athletic and educational programs for children and also helps fund programs for breast cancer research. In 2019, Chalmers would move to Athens to play professional basketball there. As of 2020, he signed with a different Greek basketball team, Aris.