He was one half of the legendary Tag Team the Rock And Roll Express with his partner Robert Gibson, in the 80's they had a ton of classic matches with Jim Cornette's Midnight Express also had good matches with the Anderson's.
Morton also had some good solo matches with Ric Flair, Flair talks about him in his book and being a great worker I believe comparing him to Ricky Steamboat.
He was brought in to the WWF for one match at Survivor Series 93 to face the Heavenly Bodies when SMW had a working agreement with the WWF.
He was later brought back in during the attitude era during that crappy NWA invasion storyline that included Jeff Jarrett, Barry Windham, and Jim Cornette.
And he had a brief run in TNA in early 2003 when the Rock and Roll Express came in turned heel, joined SEX and had a pair of matches with AMW.
EDIT: I think what crabtree was talking about was The Hardys could have kinda been considered a modern day Rock And Roll Express and borrowed some of their stuff. I always considered them more of a take off on the Rockers but the Rockers themselves were a take off of the Rock And Roll Express.