The St. Louis Cardinals added starting pitcher Erick Fedde and Milwaukee, the team they are chasing in the NL Central, acquired starter Frankie Montas among a flurry of trades Monday by playoff hopeful teams.

Kansas City got veteran right-hander Michael Lorenzen on the day before the MLB trade deadline, and the NL West-leading Los Angeles Dodgers picked up hard-throwing reliever Michael Kopeck in the three-team deal that sent right-hander Fedde and outfielder Tommy Pham from the lowly White Sox to the Cardinals.

Chicago dealt Kopech to the Dodgers, who got utilityman Tommy Edman and a pitching prospect from the Cardinals. Los Angeles sent three infield prospects to the White Sox.

The Dodgers later reacquired utilityman Amed Rosario from Tampa Bay, getting him in a deadline deal for the second year in a row — they got him from Cleveland last July for Noah Syndergaard. Rosario signed with the Rays as a free agent this spring, then hit .307 with two homers and 26 RBIs in 76 games.

Montas, the righty who was 4-8 with a 5.01 ERA in 19 starts for Cincinnati, is going to the Brewers in a rare trade between division rivals.

“This is probably the toughest time that I’ve had leaving a clubhouse,” Montas said even before the teams had announced the deal. “The relationships I created here, and the way that they welcomed me in, not just me but my family and kids, it’s definitely tough.”

But the 31-year-old Montas, traded for the fifth time since his big league debut in 2015, also described going to a first-place team as “kind of like the cool part.”