Falu went 0-for-10 during a brief stint with the Brewers this season but batted .306 with a .364 on-base percentage in 43 games at Triple-A Nashville while playing second base, third base and shortstop.
"It was certainly good for him, but I was a little surprised by it," Ash said, "given his status as a Minor League free agent [during the offseason] and that anybody could have had him. But everybody's situation has changed, and they had a need. We're well covered in that area."
Ash said infielder Hainley Statia would move from Double-A Huntsville to Nashville to fill Falu's utility role.
Adam McCalvy is a reporter for MLB.com. Read his blog, Brew Beat, and follow him on Twitter at @AdamMcCalvy. This story was not subject to the approval of Major League Baseball or its clubs.