When Johnny Cash performed at San Quentin State Prison in 1958, it certainly changed at least one inmate’s life. In the audience for that performance was a 21-year old convict by the name of Merle Ronald Haggard. Seeing Cash sing had a profound effect upon Merle and inspired him to become a singer-songwriter as well. Upon release, he embarked on a music career and wound up being one of the great all-time voices in country music history.