| 07/10/2023 |
Drafted by the Philadelphia Phillies in the 6th round of the 2023 MLB June Amateur Draft from University of Minnesota (Minneapolis, MN). |
| 07/27/2024 |
Los Angeles Angels traded RHP Carlos Estévez to Philadelphia Phillies for RHP George Klassen and LHP Samuel Aldegheri. |
| 05/13/2025 |
Rocket City Trash Pandas placed RHP George Klassen on the 7-day injured list. [Auto] |
| 06/01/2025 |
Rocket City Trash Pandas activated RHP George Klassen from the 7-day injured list. [Auto] |
| 10/14/2025 |
Named to the 2025 Arizona Fall League for the Scottsdale Scorpions. |
| 01/01/2026 |
OSA scouting updated ratings (potential): Stuff: 55 (60); Movement: 50 (50); Control: 40 (45). |
| 03/24/2026 |
Unsuccessfully completed training to improve his infield defense at the Los Angeles Angels development complex. |
| 04/11/2026 |
Injured on 04/10/2026, diagnosed with hamstring soreness, will not miss additional time. |
| 05/16/2026 |
Injured on 05/15/2026, diagnosed with an oblique strain, will miss 5 weeks. |
| 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: 55 (55); Movement: 50 (60); Control: 40 (40). |
| 03/23/2027 |
Unsuccessfully completed training to increase his velocity at the Los Angeles Angels development complex. |
| 09/11/2027 |
Injured (sore elbow),day-to-day for one week. |
| 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: 55 (55); Movement: 50 (60); Control: 40 (40). |
| 02/21/2028 |
Injured (elbow inflammation),out for 8 weeks. |
| 08/01/2028 |
Wins the PCL Pitcher of the Month Award. |
| 10/04/2028 |
Wins the 2028 Pacific Coast League Round 1 with the Salt Lake Bees! |
| 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: 55 (55); Movement: 50 (55); Control: 40 (40). |
| 02/14/2029 |
Unsuccessfully completed training to improve his secondary pitch at the Los Angeles Angels development complex. |
| 08/02/2029 |
Injured on 07/29/2029, diagnosed with a bone spur in his elbow, will miss 2 weeks. |
| 11/05/2029 |
Signed a 1-year contract extension worth a total of $2,160,000 with the Los Angeles Angels organization. |
| 01/01/2030 |
OSA scouting updated ratings (potential): Stuff: 55 (55); Movement: 50 (50); Control: 35 (40). |
| 11/06/2030 |
Signed a 1-year contract extension worth a total of $3,640,000 with the Los Angeles Angels organization. |
| 01/01/2031 |
OSA scouting updated ratings (potential): Stuff: 55 (55); Movement: 50 (50); Control: 35 (40). |
| 11/19/2031 |
Was not offered arbitration and became a free agent. |
| 12/26/2031 |
Signed a minor league contract with the Baltimore Orioles organization. |
| 01/01/2032 |
OSA scouting updated ratings (potential): Stuff: 55 (55); Movement: 50 (50); Control: 35 (35). |
| 05/04/2032 |
Injured (mild abdominal strain),day-to-day for 1 day. |
| 11/25/2032 |
Became a free agent. |
| 01/01/2033 |
OSA scouting updated ratings (potential): Stuff: 55 (55); Movement: 50 (50); Control: 35 (35). |
| 01/01/2034 |
OSA scouting updated ratings (potential): Stuff: 50 (50); Movement: 50 (50); Control: 35 (35). |
| 01/01/2035 |
OSA scouting updated ratings (potential): Stuff: 50 (50); Movement: 50 (50); Control: 35 (35). |
| LEADERBOARD APPEARANCES |
|
|
|
| Year |
Win. % |
Rank |
| 2025 |
.667 |
6 |
|
|
|
| Year |
WP |
Rank |
| 2025 |
5 |
2 |
| 2027 |
18 |
1 |
| 2029 |
9 |
2 |
|
| Year |
ERA |
Rank |
| 2025 |
0.25 |
1 |
|
| Year |
BABIP |
Rank |
| 2025 |
.205 |
2 |
|
| Year |
WHIP |
Rank |
| 2025 |
0.66 |
1 |
|
| Year |
K/BB |
Rank |
| 2025 |
5.62 |
4 |
|
| Year |
RA/9 |
Rank |
| 2025 |
6.69 |
1 |
|
| Year |
HR/9 |
Rank |
| 2025 |
0.00 |
1 |
|
| Year |
H/9 |
Rank |
| 2025 |
3.96 |
1 |
|
| Year |
BB/9 |
Rank |
| 2025 |
1.98 |
8 |
|
| Year |
K/9 |
Rank |
| 2025 |
11.15 |
4 |
|
|
|
| Year |
QSP |
Rank |
| 2025 |
.667 |
6 |
|
| Year |
GB% |
Rank |
| 2025 |
0.56 |
5 |
|
|
|