| | | Monday, December 23rd, 2013 | | Signed Yoshiki Sasaki to a minor league contract with a signing bonus of $140,000. |
| Saturday, December 21st, 2013 | | Signed Toshiki Takaki to a minor league contract with a signing bonus of $120,000. |
| Tuesday, December 17th, 2013 | | Drafted SP Buddy Wills in the 2013 first-year player draft (Round 1, Pick 8, 8th overall pick). | | Drafted LF Katsuhiko Yamamoto in the 2013 first-year player draft (Round 2, Pick 8, 33rd overall pick). | | Drafted CL J.R. Adams in the 2013 first-year player draft (Round 3, Pick 8, 57th overall pick). | | Drafted 2B Yoshiki Sasaki in the 2013 first-year player draft (Round 4, Pick 8, 81st overall pick). | | Drafted 1B Toshiki Takaki in the 2013 first-year player draft (Round 5, Pick 8, 105th overall pick). | | Drafted RF Takesi Takahashi in the 2013 first-year player draft (Round 6, Pick 8, 129th overall pick). | | Drafted 3B Jim Williams in the 2013 first-year player draft (Round 7, Pick 8, 153rd overall pick). | | Drafted RF Toshiro Shimada in the 2013 first-year player draft (Round 8, Pick 8, 177th overall pick). | | Drafted 1B Garrett Bennett in the 2013 first-year player draft (Round 9, Pick 8, 201st overall pick). | | Drafted C Julian Cooke in the 2013 first-year player draft (Round 10, Pick 8, 225th overall pick). | | Drafted 1B Terence Wheaton in the 2013 first-year player draft (Round 11, Pick 8, 249th overall pick). | | Drafted SP Lee Waller in the 2013 first-year player draft (Round 12, Pick 8, 273rd overall pick). |
| Wednesday, December 11th, 2013 | | Placed MR Pedro López on the 40-man roster. | | Placed MR Pedro López on the active roster. | | Placed MR Charles O'Connor on the 14-day disabled list, retroactive to 09/02/2013. |
| Sunday, December 8th, 2013 | | Signed free agent MR Pedro López to a 3-year contract worth a total of $9,200,000. |
| Wednesday, December 4th, 2013 | | Signed free agent MR Charles O'Connor to a 4-year contract worth a total of $38,950,000. |
| Saturday, November 30th, 2013 | | Placed SP Jeff Olsen on the 40-man roster. | | Placed SP Jeff Olsen on the active roster. | | Activated SP Jeff Olsen from the 60-day disabled list. | | Placed SP Jeff Olsen on the 60-day disabled list. |
| Saturday, November 23rd, 2013 | | Purchased the contract of SP Derrick Scott from Triple A Reno. |
| Thursday, November 21st, 2013 | | MR Ray Brady received a 1-year contract through automatic renewal worth a total of $500,000. | | 2B José Ortíz received a 1-year contract through automatic renewal worth a total of $510,000. | | MR Rich Barrett received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Ryan Owens received a 1-year contract through automatic renewal worth a total of $500,000. | | SS Nicolá Giancana received a 1-year contract through automatic renewal worth a total of $500,000. | | 3B Lou Gibson received a 1-year contract through automatic renewal worth a total of $500,000. | | 2B Alonso Núñes received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Christian Clark received a 1-year contract through automatic renewal worth a total of $500,000. | | C James Kernaghan received a 1-year contract through automatic renewal worth a total of $500,000. | | C Phillip Smith received a 1-year contract through automatic renewal worth a total of $510,000. | | 1B Ray Stevens becomes a free-agent. | | CF James Davis received a 1-year contract through automatic renewal worth a total of $510,000. | | MR Octávio Márquez received a 1-year contract through automatic renewal worth a total of $500,000. | | MR Ernie Kuhn received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Jeff Olsen received a 1-year contract through automatic renewal worth a total of $500,000. | | CF Dave Lewis received a 1-year contract through automatic renewal worth a total of $500,000. | | RF Carlos Ruíz received a 1-year contract through automatic renewal worth a total of $500,000. | | MR Nick Fox received a 1-year contract through automatic renewal worth a total of $510,000. | | SP Bob Magee received a 1-year contract through automatic renewal worth a total of $500,000. | | SP Nelson Mayer becomes a free-agent. | | MR Luis Martínez becomes a free-agent. |
| Tuesday, November 19th, 2013 | | Signed LF Jonathan Zimmerman to a minor league contract extension. |
| Monday, November 18th, 2013 | | SS Erik Bennett received a 1-year contract through arbitration worth a total of $1,150,000. | | MR Francisco García becomes a free-agent. |
| Friday, November 1st, 2013 | | Signed SP Carlos Rodríguez to a minor league contract extension. |
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