Matthew Antonio Antonelli (born April 8, 1985) is an American former professional baseball second baseman who played with the San Diego Padres in 2008.

However, he hit 14 home runs in 82 games for High A Lake Elsinore, before moving up to Double A San Antonio Missions to finish the season[citation needed].

In 534 at-bats between the two levels, Antonelli finished with a slash line of .304/.404/.491 with 21 home runs and 25 stolen bases along with a 94/83 K/BB ratio[citation needed].

Antonelli was called up to the Padres on September 1, 2008, where he promptly laced a single off Greg Maddux of the Dodgers for his first hit in the major leagues.

[12] He then went hitless in his next 20 at bats, but then got 7 hits in his next 13 at-bats with three walks, including his first home run, on September 15, off of Colorado Rockies pitcher Jason Hirsh.

[13] During the 2010 Spring Training period he suffered a Hamate bone injury and then a broken wrist, requiring multiple surgeries[citation needed].

He signed as a minor league free agent with the Washington Nationals on December 17, 2010 and spent the season with the AA Harrisburg Senators and AAA Syracuse Chiefs[citation needed].

However, he declined all of those offers due to his injury history and his belief he could not make it back to the Major Leagues, and decided to focus on a potential career of coaching[citation needed].