The Detroit Tigers Monday acquired Houston Astros relief pitcher Jamie Veras to strengthen their bullpen for the remainder of the season. Veras will become a free agent at season's end and his role with the Tigers is not immediately defined. The Tigers gave up promising outfielder Danry Vasquez to the Astros. The Tigers believe they have enough other outfield prospects to let Vasquez go. The Tigers are off Monday and host the Washington Nationals in a two game series beginning Tuesday night.