1954 The Chicago Cubs purchased Steve Bilko from the St. Louis Cardinals for $12,500
1980 The St. Louis Cardinals purchased Jim Kaat from the New York Yankees
1980– The St. Louis Cardinals signed Pedro Borbon as a free agent.
1988– The St. Louis Cardinals signed Mark Ryal as a free agent.
2000 Cardinals Mark McGwire and Jim Edmonds go deep, helping St. Louis finish the month of April with 55 home runs, tying the National League mark for homers hit by a team in a month. The Redbirds share the record with the 1947 New York Giants, who sluggers included Johnny Mize, Willard Marshall, and Walker Cooper.
2008 The Cardinals and Cubs both set a franchise record for the most victories in April. The Redbirds beat the Reds, 5-2, for their 18th win of the month, and Chicago takes their 17th game, routing the Brewers, 19-5, at Wrigley Field.
Tony Brottem (April 30, 1892 – August 5, 1929) played for the Cardinals 1916 and 1918 and had a career average of .215 with no home runs and 13 runs batted in.
Mike Barlow played for the Cardinals in 1975 as a pitcher. His career mark he was 10-6 with a 4.63 ERA in eight seasons for four different teams.
Spud Davis 1928
Gus Mancuso 1928
Burgess Whitehead 1933
Frank Cimorelli 1994
Bryan Eversgerd 1994
Dennis Dove 2007
Tyler Greene 2009
Tim Cooney 2015