Per the S-T, the Rangers have traded infielder Ray Olmedo to the Milwaukee Brewers for catcher Matt Treanor.
Treanor is a former Marlins backstop probably best known for being the husband of pro volleyball player Misty May-Treanor. He's apparently insurance in case Jarrod Saltalamacchia isn't ready to go to start the season.
Neither Treanor nor Olmedo are on major league deals, so this doesn't impact the 40 man roster.