| | | Sunday, June 13th, 2021 | | Signed free agent 2B H. Yi to a minor league contract. | | Signed free agent MR Q. Topia to a minor league contract. | | Signed free agent SS C. Licano to a minor league contract. | | Signed free agent MR A. Lanzona to a minor league contract. |
| Thursday, April 29th, 2021 | | Placed SP J. Hamm on the 40-man roster. | | Placed SP J. Hamm on the active roster. |
| Friday, April 16th, 2021 | | Signed free agent SP J. Hamm to a 2-year contract worth a total of $6,920,000. |
| Sunday, March 21st, 2021 | | Purchased the contract of SP J. Ryan from Triple A Shaoguan. | | Drafted CL M. Chon in the 2021 first-year player draft (Round 1, Pick 8, 8th overall Pick). | | Drafted RF C. Park in the 2021 first-year player draft (Round 2, Pick 8, 16th overall Pick). | | Drafted SS H. Yang in the 2021 first-year player draft (Round 3, Pick 8, 24th overall Pick). | | Drafted MR J. Yu in the 2021 first-year player draft (Round 4, Pick 8, 32nd overall Pick). | | Drafted SP Y. Ma in the 2021 first-year player draft (Round 5, Pick 8, 40th overall Pick). | | Drafted RF B. Ready in the 2021 first-year player draft (Round 6, Pick 8, 48th overall Pick). | | Drafted C S. Charland in the 2021 first-year player draft (Round 7, Pick 8, 56th overall Pick). | | Drafted SP H. Yi in the 2021 first-year player draft (Round 8, Pick 8, 64th overall Pick). | | Drafted MR G. Guppy in the 2021 first-year player draft (Round 9, Pick 8, 72nd overall Pick). | | Drafted MR A. Marcoux in the 2021 first-year player draft (Round 10, Pick 8, 80th overall Pick). |
| Wednesday, February 10th, 2021 | | Placed RF O. Kamachi on the active roster. | | Activated RF O. Kamachi from the disabled list. | | Placed MR W. Sima on the active roster. | | Activated MR W. Sima from the disabled list. | | Purchased the contract of 2B C. Tsang from Triple A Shaoguan. |
| Friday, October 23rd, 2020 | | C R. Hattie received a 1-year contract through automatic renewal worth a total of $350,000. | | CF J. Lierra received a 1-year contract through automatic renewal worth a total of $350,000. | | MR D. Yao becomes a free-agent. | | MR W. Er received a 1-year contract through automatic renewal worth a total of $350,000. | | SP E. Rollin becomes a free-agent. | | 3B C. Summers received a 1-year contract through automatic renewal worth a total of $350,000. | | LF J. Amalla received a 1-year contract through automatic renewal worth a total of $350,000. | | MR Y. Konishi received a 1-year contract through automatic renewal worth a total of $350,000. | | SS C. Chan received a 1-year contract through automatic renewal worth a total of $350,000. | | RF T. Carty received a 1-year contract through automatic renewal worth a total of $350,000. |
| Tuesday, October 20th, 2020 | | MR G. Zong becomes a free-agent. | | MR W. Pang received a 1-year contract through arbitration worth a total of $525,000. | | SP S. Tieh received a 1-year contract through arbitration worth a total of $4,651,800. | | 3B J. Dryden becomes a free-agent. | | C D. Sang received a 1-year contract through arbitration worth a total of $3,617,460. | | 2B D. Litton received a 1-year contract through arbitration worth a total of $750,000. | | SS T. Miyake becomes a free-agent. | | CF P. Santos received a 1-year contract through arbitration worth a total of $7,000,000. | | MR G. Yi becomes a free-agent. |
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