[5] His first decision was a loss to the Chicago Cubs on May 8 that year; he allowed a walk-off solo home run to Jason Heyward in the 11th inning.

[8] On September 11, 2020, Quijada surrendered a walk-off grand slam to Charlie Blackmon of the Colorado Rockies.

He proceeded to strike out all three batters, thwarting an opportunity for Seattle to take the lead and win the game, greatly hurting the team's chances of making the playoffs.

[12] In 2022, Quijada pitched in 42 games for the Angels, registering a 3.98 ERA with 52 strikeouts and 3 saves in 40+2⁄3 innings of work.

For the 2023 season, Quijada made 10 appearances, struggling to a 6.00 ERA with 8 strikeouts and 4 saves before he was placed on the injured list on April 29, 2023.