Martinez, 24, has been less-than-stellar in 35 plate appearances for the Astros this season. In his five years for the Astros and Mets, the left-handed hitting outfielder has a .206/.269/.362 slash line. Martinez was once considered to be a promising farmhand in the Mets' system and was ranked as high as No. 22 across the minors by Baseball America prior to the 2007 season.
Basford, 22, has spend the last two seasons with the Yankees' New York-Penn League affiliate. In 19 relief appearances, the right-hander has a 5.13 ERA with 7.9 K/9 and 2.7 BB/9.