Influence in MattyB
According to MattyB, Carson was one of MattyB's biggest supporters before he became famous and he told Matty that he should follow his dreams and become a rapper, stated in an interview for sports website MLB.com.
Carson in MattyB's vlogs
Carson was pictured in some of MattyB's Vlogs. Some of the Vlogs he was in were "Shake the Haters off," "MattyB and Carson ready for Snipe Hunting," "My first rap with Carson," among others. In vlog "My first rap with Carson," Carson explains that he encouraged Matty to become a rapper and at first they thought they were just going to do it for fun but then MattyB became famous. MattyB has had sleepovers with Carson as mentioned in his vlogs and is one of his best friends.
Some videos of MattyB with Carson: