In 1988 he, Jerome Fontamillas, Ray Tongpo and Wilson Peralta released a six-song demo called Wish Fifteen as Mortal Wish.
According to the liner notes of Pura, Solamente is inspired by Tonight I Can Write by Pablo Neruda and is cited as Jyro's favorite poet.
In early 2002 he released a side project on Crystal Lewis' record label Metro One Music called Juggernautz without Jerome.
In October 2002 Jyro released a new Mortal album on Tooth & Nail Records called Nu-En-Jin.
They did not tour to promote however since Jyro has stated that Mortal could continue to exist albeit only as a studio band[citation needed].