The Rangers selected Gonzales' contract from Triple-A Round Rock on Tuesday, Jeff Wilson of AllDLLS.com reports.
Gonzales joined the Rangers on a minor-league pact in late June and has since allowed 16 earned runs in just 16.2 innings over three starts. Despite his poor performance, the 34-year-old will return to the majors for the first time in two seasons and join the Rangers' bullpen as a long reliever, replacing the injured Jose Corniell (elbow).