The Rangers recalled Ornelas from Triple-A Round Rock ahead of Sunday's 6-4 extra-inning win over the Athletics.
Ornelas' addition strengthens Texas' depth in the infield, but he's unlikely to be in store for regular at-bats so long as Corey Seager, Josh Jung, Marcus Semien and Josh Smith are able to maintain health down the stretch. Prior to his promotion, Ornelas had hit .252 with three home runs and nine stolen bases over 366 plate appearances with Round Rock this season.