Armed with a 91-95 mph fastball, a slider and a splitter he uses as a changeup, Geltz has pitched in the Majors for Tampa Bay in parts of three seasons. His best year was 2015, when he made a career-high 70 appearances with a 1.05 WHIP and a 3.74 ERA. In 2016, Geltz had a 5.74 ERA and a 1.24 WHIP in 27 Major League appearances.
In parts of eight Minor League seasons in the Angels' and Rays' systems, Geltz has struck out 11.8 batters per nine innings.
He's the second experienced addition to the Brewers bullpen in less than a week. Five days ago, the Brewers claimed 31-year-old Blake Parker off waivers from the Angels.
"I don't think this will be the last move we make with the bullpen over the next couple of months," Milwaukee general manager David Stearns said. "It will be a constant effort by us to get different looks, different skill sets and give ourselves the best opportunity to put together a strong pen heading into next season."
The Brewers hope Walker clears waivers and remains in their Minor League system.
"This time of year, a lot of players make their way through waivers as teams juggle their rosters and begin to prepare for the Rule 5 Draft and set up their 40-man [rosters] for the Winter Meetings," Stearns said. "We begin to see a significant amount of waiver activity. Sometimes that means you have to expose a player we just claimed. As always, it's a little bit the cost of doing business. We felt the opportunity to get a player like Geltz was worth that exposure."
Adam McCalvy has covered the Brewers for MLB.com since 2001. Follow him on Twitter @AdamMcCalvy, like him on Facebook and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.