He played 13 seasons in Major League Baseball (MLB) from 1998 to 2010 for the Milwaukee Brewers, Colorado Rockies, Cleveland Indians, St. Louis Cardinals, Washington Nationals and the Los Angeles Dodgers.

In 2000, Belliard established career highs in several categories, including games (152), runs scored (83), hits (150) and doubles (30) while setting the Brewers' National League franchise record with career-high 9 triples.

On January 17, 2003, Belliard was signed as a minor league free agent by the Colorado Rockies after being non-tendered by Milwaukee on December 20 and became the first non-roster invitee in franchise history to start on Opening Day.

He finished 2nd in the American League with 48 doubles, which represented the highest total by an Indian since Albert Belle's 52 in 1995.

Belliard was a key part of the Cardinals' success in the 2006 National League Division Series when he hit .462 with two RBI and two runs scored.

The Cardinals defeated the San Diego Padres three games to one to advance to the National League Championship Series.

Belliard hit a game-ending two-run home run shot off of closer George Sherrill with two outs and two strikes in 12th inning, erasing a 2–1 deficit on June 29, 2008, against the Baltimore Orioles.

On August 22, 2008, Belliard was a triple away from the cycle as he singled, doubled twice, and homered in a Nationals 13–5 victory over the Chicago Cubs at Wrigley Field.

During the 2008 season Belliard set career highs with .473 slugging and .372 on-base percentages despite missing nearly two months with injuries.

[3] In 24 games with the Dodgers, he hit .351 with five home runs and took over the starting second baseman job from Orlando Hudson for the postseason.

On February 4, 2011, Belliard agreed to a minor league contract with an invitation to spring training with the New York Yankees worth $825,000.

On June 14, 2011, Belliard announced his retirement [7] During the offseason, he used to play with the Tigres del Licey in the Dominican Winter League, where he was the captain of the team.

[10]An affidavit by FBI Special Agent Dustin Sorrells said this about the case: Laura Edwards and the athlete had an "encounter" on September 29 and she left messages for him in late October or early November.

Later in November, a sports agent worked out a deal to pay $25,000 for a paternity test, and $125,000 more if the child was the athlete's.