He started playing professionally in college. He learned to play the harmonica and played around the local blues scene for years. He was a member of The Ed Burns Rhythm & Blues Revue for most of 2014.[3] During that time he began using his middle name Charles going by Matt or Matthew Charles due to the difficulty some have pronouncing his last name. In 2015, Prozialeck relocated to Boston, Massachusetts join the Vizztone band, Erin Harpe & the Delta Swingers.[3] The Delta Swingers toured nationally and were semifinalists in the International Blues Challenge in 2017. At the age of 27 he was the second youngest harmonica player in the competition and the youngest to reach the semifinals that year. His first album with the Delta Swingers, Big Road, was released on Vizztone in October 2017 to positive reviews. In a review of the album by Daniel Pavlica of The Rocktologist, his playing was recognized and the reviewer said he "played with poignancy and lusty confidence".[4] Big Road peaked at number 9 on the Roots Music Report Blues Albums Chart and was ranked number 52 on their best of 2018 list.[5][6] A 2018 article in Blues Blast Magazine described Prozialeck as the band's "secret weapon".[7] In 2017, he became an official endorser for Seydel harmonicas.[8] The Delta Swingers were nominated for a Boston Music Award and three New England Music Awards in 2018.[9] The band opened for Roomful Of Blues, Lil' Ed Williams, James Montgomery and Jason Ricci among many others during his tenure. He appeared on their album The Christmas Swing which would be his last release with the band in December 2018.[10]
In January 2019, he left Erin Harpe & the Delta Swingers to record and focus on solo and session work. He played with GA-20 in the beginning of 2018 before their trio lineup was established. Later in May of 2018, he played on a couple songs for the sessions for GA-20's debut album, Lonely Soul,[11] as a sideman. It was released in October 2019 on Karma Chef Records and peaked at number 2 on the Billboard Blues Chart.[12] He also appeared on the "GA-20 with Charlie Musselwhite and Luther Dickinson"' 7 inch single, playing harp on the B-side "Sit Down Baby" and singing backup on the A-side, "Naggin' On My Mind". He also appeared playing harmonica on their digital single "I Ain't Got You" in 2020. In October 2019 he co-founded the Boston based blues band The Wandering Ones. The Wandering Ones' first release appeared on The Rum Bar Records compilation Rabble Rousers. Prozialeck took a hiatus from performing during the COVID Pandemic. The Wandering Ones performed at the final Viva East Rockabilly festival in 2022. In 2024 Prozialeck released his debut solo album Highland Avenue. It was produced by Matthew Stubbs and recorded at Q Division Studios in Boston.