Tropeano had made 13 starts for the LA Angels in 2016 going 3-2 with a 3.56 ERA and was showing a lot of promise. Tropeano began the long road back rehabbing his right elbow after having Tommy John surgery in August of 2016.
When 2018 began Tropeano was back with the Angels and looked really good over his first eight starts posting a 3-3 record with a 3.80 ERA, turning in four quality starts and pitching well in six of his eight outings. Tropeano had a few tough outings in June and was demoted to the minors until the last week of July.