[2] Owner Nate Steinheimer commented on the label's inception, "I spent my weekends sweating through Descendents T-shirts in crowded Chicago basements [...] I aim to house artists that influence people to become as passionate about music as I was growing up.

"[3] In July 2013, Mutant League announced their partnership with Sony RED and fellow Chicago label Victory for worldwide distribution.

[4] The label contributed music for the soundtrack of the 2018 Xbox One/PlayStation 4 title Mutant Football League, which included tracks from Seaway, Belmont, Vacant Home, Ambleside, & Lucky Boys Confusion.

[6] Following the sale, Mutant League moved under the umbrella of Sony Music subsidiary The Orchard for distribution in North America.

[7] The label celebrated their 10-year anniversary with a string of Midwest tour dates in the summer of 2022, which featured Settle Your Scores, Chief State, and Wilmette.