The lefty joins first baseman and six-time All-Star Paul Goldschmidt and utility fielder Drew Robinson, both of whom arrived via trade, as new additions for the Cardinals.

Unsure how the free-agent market would move the Cardinals also explored trading for a lefty, talking with San Francisco about Will Smith and looking into Brad Hand’s availability from Cleveland, according to a source.

In limited appearances against the National League Central’s best lefthanded hitters, Miller has struck out Anthony Rizzo four times in eight at-bats and held Joey Votto hitless in three at-bats.

“Altchek saw absolutely nothing that would keep him from being the old Andrew Miller,” the lefty’s agent Mark Rodgers told The New York Post in November.

Originally a starter who bounced around the rotations for the Tigers, the Marlins and the Red Sox, Miller moved to the bullpen permanently in the 2012 season.

Miller’s 0.892 WHIP in 350 games from 2012 to 2017 ranked fourth in baseball among relievers, ahead of Pat Neshek’s 0.971 and behind closers Craig Kimbrel (0.867), Kenley Jansen (0.840), and Koji Uehara (0.839).