https://www.siliconvalley.com/2020/01/14/2020-angels-spring-training-preview-starting-rotation/

As the Angels head toward the first workout of spring training on Feb. 12, we are providing a breakdown of how they stand with different aspects of their roster. Players acquired this winter include the method of their acquisition in parentheses. Up first, the starting rotation:

The Angels endured yet another season in which their rotation was decimated, this time not only by injuries but most notably by the tragic death of Tyler Skaggs. The Angels did not have a single starting pitcher make it through the season in the rotation. Their two free-agent acquisitions, Trevor Cahill and Matt Harvey, performed poorly. Cahill was sent to the bullpen and Harvey was released. By the end of the season, Andrew Heaney was the only healthy starter who had ever spent an entire season in the big leagues. The Angels were relying on young pitchers such as Griffin Canning, José Suarez, Jaime Barría, Patrick Sandoval and Dillon Peters. The Angels resorted to using an opener in 27 games, and the openers and subsequent primary pitchers in those games combined for a 6.03 ERA. Overall, Angels starters, including the openers, had a 5.64 ERA, which ranked 29th in the majors.