Cardinals Roster & Staff
Transactions
| Date | Transaction |
| 03/31/15 | 1B Jonathan Rodriguez assigned to St. Louis Cardinals. |
| 03/30/15 | St. Louis Cardinals selected the contract of RHP Carlos Villanueva from Memphis Redbirds. |
| 03/30/15 | CF Collin Radack assigned to St. Louis Cardinals. |
| 03/30/15 | St. Louis Cardinals placed LHP Jaime Garcia on the 15-day disabled list retroactive to March 27, 2015. Recovering from July 2014 thoracic outlet syndrome surgery |
| 03/29/15 | St. Louis Cardinals optioned SS Dean Anna to Memphis Redbirds. |
| 03/29/15 | St. Louis Cardinals optioned C Ed Easley to Memphis Redbirds. |
| 03/29/15 | St. Louis Cardinals optioned 1B Xavier Scruggs to Memphis Redbirds. |
| 03/28/15 | SS Alex Mejia assigned to St. Louis Cardinals. |
| 03/28/15 | RHP Joey Donofrio assigned to St. Louis Cardinals. |
| 03/28/15 | St. Louis Cardinals traded LHP Sam Freeman to Texas Rangers for Player To Be Named Later. |
| 03/27/15 | IF Matt Williams assigned to St. Louis Cardinals. |
| 03/27/15 | OF Rowan Wick assigned to St. Louis Cardinals. |
| 03/27/15 | IF Robelys Reyes assigned to St. Louis Cardinals. |
| 03/26/15 | OF Anthony Ray assigned to St. Louis Cardinals. |
| 03/23/15 | RHP Chris Thomas assigned to St. Louis Cardinals. |
| 03/23/15 | St. Louis Cardinals optioned SS Aledmys Diaz to Memphis Redbirds. |
| 03/23/15 | LF Nick Thompson assigned to St. Louis Cardinals. |
| 03/23/15 | RHP Heath Wyatt assigned to St. Louis Cardinals. |
| 03/23/15 | St. Louis Cardinals optioned C Cody Stanley to Memphis Redbirds. |
| 03/22/15 | RHP Kyle Barraclough assigned to St. Louis Cardinals. |
| 03/22/15 | RHP Chris Perry assigned to St. Louis Cardinals. |
| 03/22/15 | OF Blake Drake assigned to St. Louis Cardinals. |
| 03/21/15 | St. Louis Cardinals optioned RHP Sam Tuivailala to Memphis Redbirds. |
| 03/21/15 | St. Louis Cardinals optioned LHP Nick Greenwood to Memphis Redbirds. |
| 03/17/15 | St. Louis Cardinals optioned LHP Tyler Lyons to Memphis Redbirds. |
| 03/17/15 | St. Louis Cardinals optioned 2B Greg Garcia to Memphis Redbirds. |
| 03/14/15 | St. Louis Cardinals optioned C Mike Ohlman to Memphis Redbirds. |
| 03/12/15 | RHP Alex Reyes assigned to St. Louis Cardinals. |
| 03/11/15 | RHP Andrew Morales assigned to St. Louis Cardinals. |
| 03/11/15 | CF Magneuris Sierra assigned to St. Louis Cardinals. |
| 03/11/15 | CF Charlie Tilson assigned to St. Louis Cardinals. |
| 03/11/15 | RHP Trey Nielsen assigned to St. Louis Cardinals. |
| 03/11/15 | RHP Patrick Wisdom assigned to St. Louis Cardinals. |
| 03/10/15 | St. Louis Cardinals signed free agent RHP Robby Rowland to a minor league contract. |
| 03/07/15 | CF C.J. McElroy assigned to St. Louis Cardinals. |
| 03/01/15 | Carlos Martinez changed number to 18. |
| 03/01/15 | Trevor Rosenthal changed number to 44. |