Quiroz, 31 in February, played in the Mexican League for years and didn’t sign with an affiliated ball club until he was almost 26. He spent time in the organizations of the Red Sox, Padres and Rays before coming to the Cubs in the Harold Ramirez trade. He was selected to the big league roster in September and was able to make his MLB debut as the season was winding down. He hit .275/.370/275 for a wRC+ of 95 over 14 games in that brief audition.
Young, 27, was selected by the Cubs in the 15th round of the 2017 draft. Like Quiroz, he was promoted to the big leagues in September and got a brief MLB audition. He got into six games and hit .263/.364/.368 for a wRC+ of 113 in that small sample. He walked in 13.6% of his plate appearances but struck out in 31.8% of them.
Players have the right to reject outrights assignments if they have three years of MLB service time or have previously been outrighted in their career. Since neither player qualifies, they will remain in the Cubs’ organization as depth but without taking up a roster spot.