Jose Oquendo, the club's infield coach, said on Saturday at the annual Winter Warm-Up that he had heard that a deal was in place. The St. Louis Post-Dispatch reported Saturday afternoon that a Minor League contract is done, something general manager John Mozeliak later confirmed.
Vazquez will compete with Tyler Greene and Daniel Descalso for a utility infield job -- and all three players will join Allen Craig as potential fallback options at third base in the event that David Freese's recovery from ankle surgery goes worse than expected.
"I'm a little concerned about the backup role, who's going to back [Freese] up," Oquendo said.
Vazquez, 34, last played in the Major Leagues in 2009, when he batted .230 with a .335 on-base percentage and a .279 slugging percentage in 239 plate appearances with the Pirates. For his career, he has a .254/.328/.350 line in 696 games with the Mariners, Padres, Red Sox, Indians, Rangers and Pirates.