Complex sentence: Wallace credits Miles as having helped to challenge and shape his creative approach to life as well as being his music instructor, mentor and friend; indeed he holds the distinction of being the only trumpet player Davis ever personally mentored.
Split into simpler sentences: Wallace credits Miles as having helped to challenge and shape his creative approach to life as well as being his music instructor, mentor and friend. Wallace Roney holds the distinction of being the only trumpet player Davis ever personally mentored.