When asked about it before the game on Wednesday, Guillen clarified the arrangement.
"You could call it a platoon," Guillen said. "With lefties, I'm pretty sure I'm going to use Nix there. Obviously he's a better right-handed hitter than Vizquel, even though Vizquel has got like 2,000 hits more than him right-handed. But I think that's what we're going to go right now.
Vizquel started the first two games following Teahen's injury, both against right-handers, going 3-for-8.
"If you're a backup player in the American League," Guillen said. "You can't expect much out of the players because they don't play for so long, only got three at-bats here, one every other week. But we play Vizquel back-to-back and I think it's worked out pretty well."
Vizquel, who has won 11 Gold Gloves for his play at shortstop, managed to catch the eye of the opposing dugout with his fielding.
"I couldn't tell whether he was at third or short the way he was fielding the baseball," Rangers manager Ron Washington said. "The boy can dance out there on defense no matter where he is. He is the best when it comes to defense."