Age: 27, 220 lbs, 6'4" Born: 3/11/1998, Granada Hills, CA, USA Sal: N/A  Currently Injured TRANSACTION REPORT 3 monthsPlaced on injured list. The Athletics placed Lopez on the 15-day injured list Tuesday with a left elbow flexor strain.
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| 2025 | ATH | 21 | 0 | 92.7 | 4.08 | 7 | 7 | 0 | 0 | 81 | 14 | 1 | 15 | 113 | 8 | 37 | 0 | 1 | 47 | 42 | 0 | 1.27 | 10.97 | 35.0 | 1.7 |
| 2024 | ATH | 4 | 0 | 10.3 | 5.23 | 0 | 0 | 0 | 0 | 5 | 1 | 0 | 2 | 8 | 2 | 7 | 0 | 0 | 7 | 6 | 0 | 1.16 | 6.97 | 0.0 | 0.0 |
| 2023 | TB | 4 | 0 | 12.3 | 4.38 | 1 | 0 | 0 | 1 | 14 | 4 | 1 | 0 | 8 | 2 | 2 | 1 | 0 | 7 | 6 | 0 | 1.30 | 5.84 | 8.0 | 2.0 |
| | | 29 | 0 | 115.3 | 4.56 | 8 | 7 | 0 | 1 | 100 | 19 | 2 | 17 | 129 | 12 | 46 | 1 | 1 | 61 | 54 | 0 | 1.24 | 7.93 | 43.0 | 1.2 |
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| 8/24/2025 | SEA@ | L4 - 11 | 0 | 2.0 | 40.50 | 0 | 1 | 0 | 0 | 6 | 1 | 0 | 2 | 2 | 0 | 6 | 0 | 0 | 9 | 9 | 0 | 6.00 | 9.00 | 0.0 |
| 8/19/2025 | MIN@ | W6 - 3 | 0 | 6.0 | 3.00 | 1 | 0 | 0 | 0 | 4 | 1 | 0 | 2 | 8 | 0 | 1 | 0 | 0 | 3 | 2 | 0 | 0.83 | 12.00 | 5.0 |
| 8/12/2025 | TB | W6 - 0 | 0 | 7.0 | 0.00 | 1 | 0 | 0 | 0 | 4 | 1 | 0 | 0 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.57 | 11.57 | 5.0 |
| 8/7/2025 | WSH@ | W6 - 0 | 0 | 7.7 | 0.00 | 1 | 0 | 0 | 0 | 3 | 1 | 0 | 0 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.39 | 11.74 | 5.0 |
| 8/1/2025 | AZ | W5 - 1 | 0 | 5.0 | 0.00 | 1 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 5 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 1.40 | 9.00 | 5.0 |
| 7/26/2025 | HOU@ | W5 - 1 | 0 | 4.3 | 0.00 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 4 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 1.38 | 8.31 | 0.0 |
| 7/21/2025 | TEX@ | L2 - 7 | 0 | 5.0 | 9.00 | 0 | 1 | 0 | 0 | 4 | 1 | 0 | 2 | 6 | 0 | 3 | 0 | 0 | 5 | 5 | 0 | 1.40 | 10.80 | 0.0 |
| 7/12/2025 | TOR | W4 - 3 | 0 | 5.0 | 3.60 | 1 | 0 | 0 | 0 | 4 | 3 | 0 | 1 | 5 | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 1.20 | 9.00 | 5.0 |
| 7/6/2025 | SF | L2 - 6 | 0 | 4.3 | 8.31 | 0 | 1 | 0 | 0 | 5 | 0 | 0 | 1 | 8 | 1 | 1 | 0 | 0 | 4 | 4 | 0 | 1.38 | 16.62 | 0.0 |
| 6/30/2025 | TB@ | W6 - 4 | 0 | 3.3 | 8.10 | 0 | 0 | 0 | 0 | 5 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 4 | 3 | 0 | 1.80 | 2.70 | 0.0 |
| | | | 0 | 49.7 | 7.25 | 5 | 3 | 0 | 0 | 42 | 8 | 0 | 9 | 58 | 1 | 20 | 0 | 0 | 27 | 25 | 0 | 1.64 | 10.07 | 25.0 |
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| J. Lopez | P | ATH | 9/10/2025 | Making good progress | elbow | + |
| J. Lopez | P | ATH | 8/25/2025 | Headed for IL with flexor strain | Forearm | + |
| J. Lopez | P | ATH | 8/24/2025 | Dealing with forearm tightness | Forearm | + |
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| J. Lopez | P | ATH | 8/26/2025 | Placed on injured list. |
| J. Lopez | P | ATH | 5/23/2025 | Recalled from Las Vegas. |
| J. Lopez | P | ATH | 4/30/2025 | Sent back to minors. |
| J. Lopez | P | ATH | 4/26/2025 | Back in majors. |
| J. Lopez | P | ATH | 4/23/2025 | Optioned to Vegas. |
| J. Lopez | P | ATH | 4/18/2025 | Recalled from Triple-A. |
| J. Lopez | P | ATH | 3/12/2025 | Optioned to Vegas. |
| J. Lopez | P | ATH | 12/14/2024 | Headed west after swap. |
| J. Lopez | P | ATH | 8/26/2024 | Optioned after spot start. |
| J. Lopez | P | ATH | 8/25/2024 | Called up for Sunday's start. |
Stars of the month
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| April 18, 2025 | J. Lopez | ATH | P | NA |
| April 20, 2025 | J. Lopez | ATH | P | NA |
| April 22, 2025 | J. Lopez | ATH | P | NA |
| April 29, 2025 | J. Lopez | ATH | P | NA |
| May 23, 2025 | J. Lopez | ATH | P | NA |
| May 29, 2025 | J. Lopez | ATH | P | NA |
| June 03, 2025 | J. Lopez | ATH | P | NA |
| June 08, 2025 | J. Lopez | ATH | P | NA |
| June 14, 2025 | J. Lopez | ATH | P | NA |
| June 19, 2025 | J. Lopez | ATH | P | NA |
| June 25, 2025 | J. Lopez | ATH | P | NA |
| June 30, 2025 | J. Lopez | ATH | P | NA |
| July 06, 2025 | J. Lopez | ATH | P | NA |
| July 12, 2025 | J. Lopez | ATH | P | NA |
| July 21, 2025 | J. Lopez | ATH | P | NA |
| July 26, 2025 | J. Lopez | ATH | P | NA |
| August 01, 2025 | J. Lopez | ATH | P | NA |
| August 07, 2025 | J. Lopez | ATH | P | NA |
| August 12, 2025 | J. Lopez | ATH | P | NA |
| August 19, 2025 | J. Lopez | ATH | P | NA |
| August 24, 2025 | J. Lopez | ATH | P | NA |
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Stars of the week
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| April 29, 2025 | J. Lopez | ATH | P | NA |
| May 23, 2025 | J. Lopez | ATH | P | 3rd star |
| May 29, 2025 | J. Lopez | ATH | P | NA |
| June 03, 2025 | J. Lopez | ATH | P | NA |
| June 08, 2025 | J. Lopez | ATH | P | 2nd star |
| June 14, 2025 | J. Lopez | ATH | P | 2nd star |
| June 19, 2025 | J. Lopez | ATH | P | 3rd star |
| June 25, 2025 | J. Lopez | ATH | P | 2nd star |
| June 30, 2025 | J. Lopez | ATH | P | NA |
| July 06, 2025 | J. Lopez | ATH | P | NA |
| July 12, 2025 | J. Lopez | ATH | P | Rookie star |
| July 21, 2025 | J. Lopez | ATH | P | NA |
| July 26, 2025 | J. Lopez | ATH | P | 2nd star |
| August 01, 2025 | J. Lopez | ATH | P | NA |
| August 07, 2025 | J. Lopez | ATH | P | NA |
| August 12, 2025 | J. Lopez | ATH | P | NA |
| August 19, 2025 | J. Lopez | ATH | P | NA |
| August 24, 2025 | J. Lopez | ATH | P | NA |
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