• Hot Stove Tracker: Free agents and trades
Flores, a 23-year-old left-handed hitter, went from the Yankees to the Mariners in a July trade for Dustin Ackley. Flores is a .275/.363/.405 hitter in parts of seven Minor League seasons and went 7-for-32 in a brief Major League stint with New York prior to the trade. He batted .423 in his first 14 games with the Mariners' Triple-A affiliate before suffering a high right ankle fracture chasing down a fly ball.
Flores, who will turn 24 just before Opening Day, should be ready for the start of Spring Training, Stearns said.
"We're happy to add a left-handed-hitting outfielder to complement our current group," Stearns said. "Ramon has hit consistently throughout his Minor League career, and we believe he can contribute at the Major League level."
Flores is out of Minor League options. He has experience at all three outfield positions, plus first base.
The 22-year-old Sardinas might have competed for a bench job with the Brewers next spring, but became expendable after Thursday's trade for Villar. Sardinas appeared in 36 games for the Brewers in 2015 but did not distinguish himself at the plate, going 19-for-97 with only one extra-base hit, a triple.
The Brewers acquired Sardinas from the Rangers in January as part of a prospect package for pitcher Yovani Gallardo.
Adam McCalvy is a reporter for MLB.com. 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.