In 1980, Avsec wrote and produced the debut album for the band LaFlavour which garnered the hit single "Mandolay," climbing to number 7 on Billboard's Disco Chart.
Avsec has played with other musicians such as Mason Ruffner and The James Gang featuring Joe Walsh, Jimmy Fox, and Dale Peters.
In addition to Donnie Iris & the Cruisers, Wild Cherry, and James Gang, Avsec was a member of the Cleveland, Ohio-based band, Breathless.
[4] He has also released material in collaboration with fellow Donnie Iris and the Cruisers member Kevin Valentine under the pseudonym Cellarful of Noise.
[5] In 2010, "Angel Love (Come For Me)," a song Avsec co-wrote with Mason Ruffner and Alan Greene, was included on Carlos Santana's Supernatural (Legacy Edition) album.