 On December 11, 1956, Landrith, along with Jim Davis, Sam Jones, and Eddie Miksis was traded to the St. Louis Cardinals for Wally Lamers, Jackie Collum, Ray Katt, and Tom Poholsky.Landrith locked his in contract for the 1957 season by signing his pact with the Cardinals on December 18.When general manager Fred Hutchinson commented on all the acquisitions the Cards had for the upcoming season, he said that Landrith would be a good backup catcher for current starter Hal Smith, just coming off a successful rookie season.