Matthew Steven Mangini (born December 21, 1985 in Springfield, MA) is a former Major League Baseball infielder who played for the Seattle Mariners in 2010.

Mangini played college baseball for both the NC State Wolfpack and Oklahoma State Cowboys. In 2006, he played collegiate summer baseball with the Hyannis Mets of the Cape Cod Baseball League, winning the league's Thurman Munson Award for highest batting average (.310), and being named starting third baseman at the league's all-star game.

He was drafted by the Seattle Mariners in the supplemental 1st round of the 2007 amateur draft. He was signed by scout Dan Wright and made his pro debut that summer.

On September 22, 2010, Matt was added to the Seattle Mariners 40-man roster. He picked up his first hit on Sept. 23, 2010 vs the Blue Jays. Altogether, he appeared in 11 games for the Seattle Mariners in 2010, hitting .211 with no homers and 1 RBI. He started the 2011 season on the disabled list and was activated on April 21, but was immediately optioned to Triple-A. He was released on August 23, after leaving Triple-A Tacoma for an undisclosed personal issue.

The Tampa Bay Rays signed Mangini to a minor league contract on December 6, 2011. He also received an invitation to spring training. The Arizona Diamondbacks signed Mangini to a minor league contract on August 14, 2012. He signed a minor league contract with the Cincinnati Reds on February 2, 2013. He was released on March 27.

Matt is on Twitter: @Mangini_Matt

(excerpted from Baseball Almanac, BR Bullpen & Wikipedia)