| 07/11/2025 |
Drafted by the Texas Rangers 115th overall in the 2025 Amateur Draft. |
| 07/21/2025 |
Texas Rangers signed RHP Mason McConnaughey. [Auto] |
| 07/22/2025 |
RHP Mason McConnaughey assigned to ACL Rangers. [Auto] |
| 07/22/2025 |
ACL Rangers placed RHP Mason McConnaughey on the full-season injured list. [Auto] |
| 01/01/2026 |
OSA scouting updated ratings (potential): Stuff: 45 (50); Movement: 40 (50); Control: 35 (45). |
| 08/17/2026 |
Injured on 08/16/2026, diagnosed with biceps tendinitis, will miss 1-2 weeks. |
| 10/01/2026 |
Wins the 2026 Carolina League Round 1 with the Hickory Crawdads! |
| 12/28/2026 |
Was traded by the Texas Rangers to the Baltimore Orioles, along with C Jose Camacho, in exchange for SP Albert Suarez. |
| 01/01/2027 |
OSA scouting updated ratings (potential): Stuff: 40 (45); Movement: 45 (55); Control: 35 (45). |
| 06/01/2027 |
Injured (finger blister),day-to-day for 2 days. |
| 06/27/2027 |
Was selected to the 2027 South Atlantic League All-Star Game. |
| 01/01/2028 |
OSA scouting updated ratings (potential): Stuff: 45 (50); Movement: 50 (55); Control: 40 (45). |
| 05/15/2028 |
Injured on 05/13/2028, diagnosed with a sore shoulder, is day-to-day. |
| 06/13/2028 |
Injured (finger blister),day-to-day for one week. |
| 07/04/2028 |
Injured (finger blister),day-to-day for one week. |
| 07/31/2028 |
Was traded by the Baltimore Orioles to the Kansas City Royals, along with C Alex Gonzalez and RP Lupe Matias, in exchange for 3B Maikel Garcia. |
| 08/13/2028 |
Injured (back spasms),day-to-day for 2 days. |
| 12/21/2028 |
Added to the secondary (40-man) roster for the Kansas City Royals. |
| 01/01/2029 |
OSA scouting updated ratings (potential): Stuff: 45 (50); Movement: 50 (55); Control: 40 (45). |
| 09/24/2029 |
Injured on 09/21/2029, diagnosed with a torn flexor tendon in his elbow, will miss 13-14 months. |
| 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: 45 (50); Movement: 50 (55); Control: 45 (45). |
| 11/25/2030 |
Received a 1-year contract through automatic renewal worth a total of $740,000. |
| 01/01/2031 |
OSA scouting updated ratings (potential): Stuff: 50 (50); Movement: 55 (55); Control: 45 (45). |
| 02/12/2031 |
Unsuccessfully completed training to increase his endurance on the mound at the Kansas City Royals development complex. |
| 03/11/2031 |
Injured (flu-like symptoms),day-to-day for 1 day. |
| 03/11/2031 |
Injured (biceps tendinitis),out for 3 weeks. |
| 05/19/2031 |
Injured (finger blister),day-to-day for 5 days. |
| 06/09/2031 |
Injured on 06/06/2031, diagnosed with shoulder inflammation, will miss 5-6 months. |
| 11/21/2031 |
Received a 1-year contract through automatic renewal worth a total of $740,000. |
| 01/01/2032 |
OSA scouting updated ratings (potential): Stuff: 50 (50); Movement: 55 (55); Control: 50 (50). |
| 02/18/2032 |
Injured (torn fingernail),day-to-day for 5 days. |
| 04/04/2032 |
Injured (finger blister),day-to-day for 4 days. |
| 06/02/2032 |
Injured (sore elbow),day-to-day for 4 days. |
| 07/23/2032 |
Injured (back tightness),day-to-day for 2 days. |
| 07/28/2032 |
Injured (finger blister),day-to-day for 1 day. |
| 08/10/2032 |
Injured (back stiffness),day-to-day for 4 days. |
| 08/24/2032 |
Injured (back stiffness),day-to-day for 1 day. |
| 09/03/2032 |
Injured on 08/30/2032, diagnosed with a torn flexor tendon in his elbow, will miss 15-16 months. |
| 11/02/2032 |
Added to the secondary (40-man) roster for the Kansas City Royals. |
| 11/25/2032 |
Received a 1-year contract through automatic renewal worth a total of $740,000. |
| 01/01/2033 |
OSA scouting updated ratings (potential): Stuff: 45 (45); Movement: 50 (55); Control: 50 (50). |
| 01/02/2033 |
Designated for assignment and placed on waivers by the Kansas City Royals. |
| 11/12/2033 |
Became a free agent. |
| 01/01/2034 |
OSA scouting updated ratings (potential): Stuff: 45 (45); Movement: 50 (50); Control: 50 (50). |
| 01/01/2035 |
OSA scouting updated ratings (potential): Stuff: 45 (45); Movement: 50 (50); Control: 50 (50). |