| Year | W | L | Sv | Hold | IP | H | BB | SO | ER | ERA | WHIP | Rate |
| 2026 proj | 2 | 2 | 0 | 6 | 32.0 | 24 | 9 | 40 | 13 | 3.77 | 1.040 | 9.8 |
| 2025 | 2 | 0 | 0 | 0 | 10.0 | 7 | 3 | 10 | 3 | 2.70 | 1.000 | 7.5 |
| 2023 | 3 | 4 | 1 | 15 | 52.3 | 30 | 16 | 77 | 18 | 3.10 | 0.879 | 28.2 |
| 2022 | 2 | 2 | 0 | 8 | 58.0 | 63 | 14 | 55 | 35 | 5.43 | 1.328 | 1.4 |
| Date | News |
| 3/15/26 | Angels' Stephenson out with another elbow injury. Los Angeles Angels right-hander Robert Stephenson has another elbow injury and the reliever will be examined by orthopedist Dr. Keith Meister. Source: https://www.espn.com/mlb/story/_/id/48207831/angel... |
| 3/14/26 | Angels' Stephenson out with another elbow injury. Los Angeles Angels right-hander Robert Stephenson has another elbow injury and the reliever will be examined by orthopedist Dr. Keith Meister. Source: https://www.espn.com/mlb/story/_/id/48207831/angel... |
| 3/06/26 | Angels’ Robert Stephenson faces hitters for the first time this spring. The right-handed reliever, who has missed most of his first two years with the Angels because of injuries, says he will be ready for Opening Day. Source: https://www.ocregister.com/2026/03/06/angels-rober... |
| 2/06/26 | Angels 2026 spring training position preview: bullpen. The Angels go into camp without a predetermined closer. The most likely candidates are Robert Stephenson and Ben Joyce, who are both coming off serious injuries, or newcomers Kirby Yates and Jordan Romano. Source: https://www.ocregister.com/2026/02/06/angels-2026-... |
| 2/06/26 | Angels 2026 spring training position preview: bullpen. The Angels go into camp without a predetermined closer. The most likely candidates are Robert Stephenson and Ben Joyce, who are both coming off serious injuries, or newcomers Kirby Yates and Jordan Romano. Source: https://www.ocregister.com/2026/02/06/angels-2026-... |
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