April 5, 2012
Atlanta Braves sign SP Andy Pettitte
April 15, 2012
St Louis Cardinals trade SP Ricky Nolasco and RP Mitchell Boggs to Texas Rangers for C Yorvit Torreabla and SP Marco Estrada
Texas Rangers sign C Gerald Laird
April 19, 2012
Detroit Tigers add 3B Nick Castellanos, LHP Drew Smyly, Adam Wilk and Casey Crosby and release P Robbie Weinhardt and P Jose Ortega
April 25, 2012
Kansas City Royals trade SP Michael Pineda to the Atlanta Braves for SP Julio Teheran and SP Alfredo Aceves
Atlanta Braves sign SP Andy Pettitte
April 15, 2012
St Louis Cardinals trade SP Ricky Nolasco and RP Mitchell Boggs to Texas Rangers for C Yorvit Torreabla and SP Marco Estrada
Texas Rangers sign C Gerald Laird
April 19, 2012
Detroit Tigers add 3B Nick Castellanos, LHP Drew Smyly, Adam Wilk and Casey Crosby and release P Robbie Weinhardt and P Jose Ortega
April 25, 2012
Kansas City Royals trade SP Michael Pineda to the Atlanta Braves for SP Julio Teheran and SP Alfredo Aceves