| 07/09/2023 |
Drafted by the Colorado Rockies in the 2nd round of the 2023 MLB June Amateur Draft from Wake Forest University (Winston-Salem, NC). |
| 05/02/2025 |
LHP Sean Sullivan assigned to ACL Rockies. [Auto] |
| 05/08/2025 |
LHP Sean Sullivan assigned to Fresno Grizzlies from ACL Rockies. [Auto] |
| 05/13/2025 |
LHP Sean Sullivan assigned to Hartford Yard Goats from Fresno Grizzlies. [Auto] |
| 10/02/2025 |
Wins the 2025 California League Round 2 with the Fresno Grizzlies! |
| 10/11/2025 |
Finished 3rd in 2025 EL Outstanding Pitcher Award voting. |
| 11/25/2025 |
Received a 1-year contract through automatic renewal worth a total of $740,000. |
| 01/01/2026 |
OSA scouting updated ratings (potential): Stuff: 45 (60); Movement: 45 (45); Control: 50 (50). |
| 01/19/2026 |
Designated for assignment and placed on waivers by the Colorado Rockies. |
| 01/22/2026 |
Was claimed off waivers by Arizona while with Colorado. |
| 03/13/2026 |
Injured (strained forearm),day-to-day for one week. |
| 11/28/2026 |
Received a 1-year contract through automatic renewal worth a total of $740,000. |
| 01/01/2027 |
OSA scouting updated ratings (potential): Stuff: 45 (65); Movement: 45 (50); Control: 50 (55). |
| 04/10/2027 |
Injured on 04/09/2027, diagnosed with shoulder tendinitis, will miss 5-6 weeks. |
| 08/01/2027 |
Injured (shoulder inflammation),out for 8 weeks. |
| 11/30/2027 |
Received a 1-year contract through automatic renewal worth a total of $740,000. |
| 01/01/2028 |
OSA scouting updated ratings (potential): Stuff: 50 (60); Movement: 50 (50); Control: 50 (55). |
| 03/05/2028 |
Injured on 03/04/2028, diagnosed with a mild calf strain, will not miss additional time. |
| 11/26/2028 |
Received a 1-year contract through automatic renewal worth a total of $740,000. |
| 01/01/2029 |
OSA scouting updated ratings (potential): Stuff: 50 (50); Movement: 50 (50); Control: 50 (50). |
| 05/10/2029 |
Injured on 05/07/2029, diagnosed with a herniated disc, will miss 2-3 weeks. |
| 11/24/2029 |
Received a 1-year contract through automatic renewal worth a total of $740,000. |
| 01/01/2030 |
OSA scouting updated ratings (potential): Stuff: 50 (55); Movement: 50 (50); Control: 50 (50). |
| 02/26/2030 |
Injured (herniated disc (back)),out for 5-6 weeks. |
| 05/06/2030 |
Injured on 05/02/2030, diagnosed with a torn meniscus, will miss 4 months. |
| 05/06/2030 |
Transferred to the 60-day IL. |
| 11/23/2030 |
Received a 1-year contract through arbitration worth a total of $1,900,000. |
| 01/01/2031 |
OSA scouting updated ratings (potential): Stuff: 50 (55); Movement: 50 (50); Control: 50 (50). |
| 08/02/2031 |
Was claimed off waivers by Toronto while with Arizona. |
| 08/02/2031 |
Released by the Toronto Blue Jays. |
| 08/07/2031 |
Signed a minor league contract with majors option with the Houston Astros organization. |
| 11/02/2031 |
Signed a 1-year contract extension worth a total of $3,360,000 with the Houston Astros organization. |
| 01/01/2032 |
OSA scouting updated ratings (potential): Stuff: 50 (50); Movement: 50 (50); Control: 45 (45). |
| 08/20/2032 |
Released by the Houston Astros. |
| 08/25/2032 |
Signed a minor league contract with the Boston Red Sox organization. |
| 11/06/2032 |
Signed a 1-year contract extension worth a total of $2,120,000 with the Boston Red Sox organization. |
| 01/01/2033 |
OSA scouting updated ratings (potential): Stuff: 50 (50); Movement: 50 (50); Control: 45 (45). |
| 08/06/2033 |
Released by the Boston Red Sox. |
| 08/11/2033 |
Signed a minor league contract with the St. Louis Cardinals organization. |
| 09/04/2033 |
Injured on 09/02/2033, diagnosed with a mild hamstring strain, is day-to-day. |
| 11/12/2033 |
Became a free agent. |
| 12/26/2033 |
Signed a minor league contract with majors option with the Houston Astros organization. |
| 01/01/2034 |
OSA scouting updated ratings (potential): Stuff: 50 (50); Movement: 50 (50); Control: 45 (45). |
| 09/18/2034 |
Injured on 09/15/2034, diagnosed with a herniated disc, will miss 6-7 weeks. |
| 11/11/2034 |
Became a free agent. |
| 01/01/2035 |
OSA scouting updated ratings (potential): Stuff: 50 (50); Movement: 50 (50); Control: 40 (40). |
| 01/01/2036 |
OSA scouting updated ratings (potential): Stuff: 50 (50); Movement: 50 (50); Control: 40 (40). |