He has previously played in Major League Baseball (MLB) for the Philadelphia Phillies, Pittsburgh Pirates, Cleveland Indians, Boston Red Sox, and Tampa Bay Rays.

That year, he played for the Vermont Lake Monsters, Savannah Sand Gnats and Potomac Nationals, hitting a combined .265 with 11 stolen bases in 82 games.

In 2010, he played for the Senators and Syracuse Chiefs, hitting a combined .272 with 11 home runs and 23 stolen bases.

He spent the season acting as a utility infielder and outfielder, recording a .196 batting average with 3 home runs and 24 RBI in 89 games.

Martínez opened the 2012 year on the Disabled List due to a broken foot suffered during Spring Training.

After playing only one game with Lehigh Valley, Martínez returned to the Phillies' 25-man roster following an injury to second baseman Freddy Galvis.

[citation needed] He was designated for assignment on September 2, 2014, when the contract of Chase d'Arnaud was selected and was added to the 40-man roster.

[3] On July 2, 2016, Martínez was designated for assignment to make room on the 25-man roster for Shawn Morimando after a 19-inning game the day before that exhausted the entire bullpen.

On December 2, 2017, Martínez re–signed with the Indians on a new minor league contract that included an invitation to spring training.

[13] On March 11, 2019, Martínez signed with the Lancaster Barnstormers of the independent Atlantic League of Professional Baseball.

On March 9, 2021, Martínez signed with the High Point Rockers of the Atlantic League of Professional Baseball.

[16] He played in 75 games for High Point, hitting .304/.370/.424 with 5 home runs, 35 RBI, and 6 stolen bases.