Flores Jr. begins his first season with the Ducks and 10th in professional baseball. The pitcher joins the Ducks after spending parts of two seasons in the Major Leagues. He pitched with the Chicago White Sox in 2020 and the St. Louis Cardinals in 2021, making three relief appearances. The southpaw has also pitched in the Colorado Rockies, Cincinnati Reds and Texas Rangers organizations, reaching Triple-A with each. In 103 games (94 starts) across five MLB organizations, he has compiled a 29-32 record with a 3.57 ERA, one complete game and 401 strikeouts to 136 walks over 504.1 innings of work.

The California native earned back-to-back MiLB.com Organization All-Star selections with the White Sox in 2017 and 2018. During the 2018 campaign, he was also named a Carolina League Mid-Season All-Star and earned a Rawlings MiLB Gold Glove selection. The 29-year-old spent the past two seasons in the Mexican League. He combined to make 26 appearances (15 starts) with three different teams, striking out 48 batters in 74.1 innings. Flores Jr. was originally selected by the White Sox in the seventh round of the 2016 amateur draft from the University of Southern California.