| 11/26/2028 |
Entered the Major League Baseball as a free agent from South Korea. |
| 12/14/2028 |
Signed a 3-year contract worth a total of $22,500,000 with the Oakland Athletics organization. |
| 01/01/2029 |
OSA scouting updated ratings (potential): Stuff: 20 (20); Movement: 14 (14); Control: 15 (15). |
| 07/08/2029 |
Was selected to the 2029 Major League Baseball All-Star Game. |
| 01/01/2030 |
OSA scouting updated ratings (potential): Stuff: 19 (20); Movement: 14 (14); Control: 16 (16). |
| 11/13/2030 |
Executed his contract year option. |
| 01/01/2031 |
OSA scouting updated ratings (potential): Stuff: 19 (19); Movement: 14 (14); Control: 16 (16). |
| 10/25/2031 |
Wins the 2031 World Series with the Oakland Athletics. |
| 10/30/2031 |
Signed a 1-year contract extension worth a total of $9,000,000 with the Oakland Athletics organization. |
| 01/01/2032 |
OSA scouting updated ratings (potential): Stuff: 19 (19); Movement: 13 (14); Control: 16 (16). |
| 10/07/2032 |
Injured (Back spasms), day-to-day for 3 days. |
| 11/02/2032 |
Signed a 1-year contract extension worth a total of $10,500,000 with the Oakland Athletics organization. |
| 01/01/2033 |
OSA scouting updated ratings (potential): Stuff: 18 (18); Movement: 13 (14); Control: 16 (16). |
| 02/26/2033 |
Injured (Rotator cuff strain), out for 4-5 weeks. |
| 11/02/2033 |
Wins the 2033 World Series with the Oakland Athletics. |
| 11/24/2033 |
Became a free agent. |
| 01/01/2034 |
OSA scouting updated ratings (potential): Stuff: 11 (14); Movement: 13 (13); Control: 13 (13). |