From Jamison:

According to Susan Slusser of the San Francisco Chronicle, Texas has traded righthander Edwar Ramirez to Oakland for non-roster infielder Gregorio Petit. The 25-year-old Petit was reassigned to minor league camp three days ago by the A's, for whom he'd spent his entire nine-year pro career.

Considered a defense-first infielder (and primarily a shortstop), the Venezuelan is a career .268/.322/.369 minor league hitter (.278/.304/.333 in 54 big league at-bats). He went 6-for-11 (.545/.667/.818 with four walks and two strikeouts) in camp for the A's before being reassigned.

Petit presumably enters the mix for the big league utility infield job.

The removal of Ramirez, purchased on March 9 from the Yankees, clears up a roster spot for the Rangers since he was on the club's 40-man roster.

 See Ya', Spiderman!