The Brewers designated Rengifo for assignment Tuesday, Adam McCalvy of MLB.com reports.
The move is hardly a surprise with the recent news that prospect Cooper Pratt is being promoted to the big-league roster. Rengifo inked a one-year, $3.5 million contract with Milwaukee in February, but he never got his bat on track with a .205/.280/.254 slash line in 209 plate appearances while also struggling defensively.