Robert Michael Kielty (last name pronounced KELT-ee) (born August 5, 1976) is an American former professional baseball outfielder.

He played for the Minnesota Twins, Toronto Blue Jays, Oakland Athletics, and Boston Red Sox during a Major League Baseball (MLB) career that lasted from 2001 to 2007.

In his final MLB season, Kielty won the 2007 World Series over the Colorado Rockies as a member of the Red Sox.

On August 26, Kielty was promoted to the Salt Lake Stingers of the Pacific Coast League, where he played in only nine games, and hit .242 with 2 RBI.

After the Twins traded right fielder Matt Lawton to the New York Mets midway through the 2001 season, the team frequently used a platoon of Kielty and Dustan Mohr in right field.

Twins fans were so accustomed to seeing one or the other player in right field that broadcasters Bert Blyleven and Dick Bremer dubbed the duo "Dusty Kielmohr".

Kielty began the 2003 season with a 12-game hitting streak with the Twins, and had his first career two-homer game on April 17 against Detroit.

On July 16, Minnesota traded Kielty to the Toronto Blue Jays for left fielder Shannon Stewart.

He made his Blue Jays debut the next day against the Boston Red Sox, going 3 for 4 with a home run and 3 RBI.

Kielty cut his hair in the 2005 off-season, and began the 2006 season with the Athletics Triple A affiliate, the Sacramento River Cats.

With Oakland, he managed to play in 81 games, hitting .270 with 8 HR and 36 RBI, helping the club make the playoffs.

Kielty returned to Oakland for the 2007 season, however, he ran into injury problems, and played in just 13 games, hitting .200 with 0 HR and 3 RBI.

On August 6, the Boston Red Sox signed Kielty to a minor-league deal, setting up his potential promotion as a fourth outfielder.

On August 18, the Red Sox called Kielty up from Triple-A Pawtucket, following the trade of Wily Mo Peña to the Washington Nationals.

[5] On March 31, 2008, Kielty accepted an assignment to the Pawtucket Red Sox rather than opt for free agency.