Age: 25, 225 lbs, 6'2" Born: 2/18/2000, Chicago, IL, USA Sal: N/A  Currently Injured TRANSACTION REPORT 5 monthsShut down with elbow strain. The Rockies placed Halvorsen on the 15-day injured list Sunday due to a right elbow strain.
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| 2025 | COL | 42 | 0 | 39.7 | 4.99 | 1 | 2 | 0 | 11 | 41 | 10 | 1 | 7 | 36 | 0 | 21 | 3 | 0 | 26 | 22 | 0 | 1.56 | 8.17 | 38.0 | 0.9 |
| 2024 | COL | 12 | 0 | 12.3 | 1.46 | 2 | 1 | 0 | 2 | 8 | 0 | 0 | 2 | 13 | 1 | 2 | 0 | 1 | 3 | 2 | 0 | 0.81 | 9.49 | 16.0 | 1.3 |
| | | 54 | 0 | 52.0 | 3.23 | 3 | 3 | 0 | 13 | 49 | 10 | 1 | 9 | 49 | 1 | 23 | 3 | 1 | 29 | 24 | 0 | 1.19 | 8.83 | 54.0 | 1.1 |
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| 8/2/2025 | PIT | W8 - 5 | 0 | 0.0 | - | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | - | - | 0.0 |
| 7/28/2025 | CLE@ | W8 - 6 | 0 | 1.0 | 9.00 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 0 | 1 | 1 | 0 | 3.00 | 9.00 | 3.0 |
| 7/25/2025 | BAL@ | W6 - 5 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0.00 | 3.0 |
| 7/22/2025 | STL | W8 - 4 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1.00 | 9.00 | 0.0 |
| 7/18/2025 | MIN | W6 - 4 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.00 | 18.00 | 3.0 |
| 7/9/2025 | BOS@ | L2 - 10 | 0 | 0.0 | - | 0 | 0 | 0 | 0 | 4 | 1 | 0 | 2 | 0 | 0 | 1 | 0 | 0 | 5 | 5 | 0 | - | - | 0.0 |
| 7/6/2025 | CWS | W6 - 4 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1.00 | 0.00 | 3.0 |
| 7/3/2025 | HOU | W7 - 6 | 0 | 1.3 | 6.75 | 0 | 0 | 0 | 1 | 3 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 2.25 | 6.75 | 3.0 |
| 6/29/2025 | MIL@ | W4 - 3 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 3.00 | 9.00 | 0.0 |
| 6/26/2025 | LAD | L1 - 3 | 0 | 1.0 | 0.00 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 | 9.00 | 0.0 |
| | | | 0 | 8.3 | 1.58 | 0 | 0 | 0 | 5 | 11 | 1 | 1 | 2 | 7 | 0 | 7 | 0 | 0 | 7 | 7 | 0 | 1.13 | 6.08 | 15.0 |
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| S. Halvor | P | COL | 9/10/2025 | Resumes throwing | elbow | + |
| S. Halvor | P | COL | 8/21/2025 | Not making much progress | elbow | + |
| S. Halvor | P | COL | 8/4/2025 | Could return in 2025 | elbow | + |
| S. Halvor | P | COL | 8/2/2025 | Exits with apparent injury | Undisclosed | + |
| S. Halvor | P | COL | 8/2/2025 | May have serious elbow injury | elbow | + |
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| S. Halvor | P | COL | 8/3/2025 | Shut down with elbow strain. |
| S. Halvor | P | COL | 8/30/2024 | Set for MLB debut. |
Stars of the month
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| March 29, 2025 | S. Halvor | COL | P | NA |
| April 02, 2025 | S. Halvor | COL | P | NA |
| April 04, 2025 | S. Halvor | COL | P | NA |
| April 09, 2025 | S. Halvor | COL | P | NA |
| April 10, 2025 | S. Halvor | COL | P | NA |
| April 15, 2025 | S. Halvor | COL | P | NA |
| April 20, 2025 | S. Halvor | COL | P | NA |
| April 22, 2025 | S. Halvor | COL | P | NA |
| April 25, 2025 | S. Halvor | COL | P | NA |
| April 26, 2025 | S. Halvor | COL | P | NA |
| April 29, 2025 | S. Halvor | COL | P | NA |
| April 30, 2025 | S. Halvor | COL | P | NA |
| May 04, 2025 | S. Halvor | COL | P | Rookie star |
| May 07, 2025 | S. Halvor | COL | P | NA |
| May 09, 2025 | S. Halvor | COL | P | NA |
| May 11, 2025 | S. Halvor | COL | P | NA |
| May 16, 2025 | S. Halvor | COL | P | NA |
| May 17, 2025 | S. Halvor | COL | P | NA |
| May 19, 2025 | S. Halvor | COL | P | NA |
| May 23, 2025 | S. Halvor | COL | P | NA |
| May 25, 2025 | S. Halvor | COL | P | NA |
| May 27, 2025 | S. Halvor | COL | P | NA |
| May 30, 2025 | S. Halvor | COL | P | NA |
| June 02, 2025 | S. Halvor | COL | P | NA |
| June 03, 2025 | S. Halvor | COL | P | NA |
| June 08, 2025 | S. Halvor | COL | P | NA |
| June 10, 2025 | S. Halvor | COL | P | NA |
| June 12, 2025 | S. Halvor | COL | P | NA |
| June 16, 2025 | S. Halvor | COL | P | NA |
| June 18, 2025 | S. Halvor | COL | P | NA |
| June 19, 2025 | S. Halvor | COL | P | NA |
| June 22, 2025 | S. Halvor | COL | P | NA |
| June 26, 2025 | S. Halvor | COL | P | NA |
| June 29, 2025 | S. Halvor | COL | P | NA |
| July 03, 2025 | S. Halvor | COL | P | NA |
| July 06, 2025 | S. Halvor | COL | P | NA |
| July 09, 2025 | S. Halvor | COL | P | NA |
| July 18, 2025 | S. Halvor | COL | P | NA |
| July 22, 2025 | S. Halvor | COL | P | NA |
| July 25, 2025 | S. Halvor | COL | P | NA |
| July 28, 2025 | S. Halvor | COL | P | NA |
| August 02, 2025 | S. Halvor | COL | P | 2nd star |
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Stars of the week
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| April 09, 2025 | S. Halvor | COL | P | 3rd star |
| April 15, 2025 | S. Halvor | COL | P | Rookie star |
| April 22, 2025 | S. Halvor | COL | P | Rookie star |
| April 29, 2025 | S. Halvor | COL | P | 1st star |
| May 11, 2025 | S. Halvor | COL | P | NA |
| May 16, 2025 | S. Halvor | COL | P | 1st star |
| May 19, 2025 | S. Halvor | COL | P | Rookie star |
| May 30, 2025 | S. Halvor | COL | P | 1st star |
| June 08, 2025 | S. Halvor | COL | P | 2nd star |
| June 10, 2025 | S. Halvor | COL | P | 3rd star |
| June 19, 2025 | S. Halvor | COL | P | 1st star |
| July 03, 2025 | S. Halvor | COL | P | 1st star |
| July 09, 2025 | S. Halvor | COL | P | NA |
| July 28, 2025 | S. Halvor | COL | P | 1st star |
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