[4] Arriola was elected to the Guam Legislature in 1954 and served for two consecutive terms.
[5] In 1970, Arriola teamed up with Vicente Bamba in the Democratic Party of Guam Gubernatorial Primary.
In the primary, Arriola-Bamba faced the teams of Ricardo J. Bordallo and Richard F. Taitano and former appointed governor Manuel F. Leon Guerrero and Antonio C. Yamashita.
In 1974, Arriola teamed up with Ted S. Nelson in the Democratic Party of Guam Gubernatorial Primary.
In the primary, Arriola-Nelson placed 4th against the teams of Ricardo J. Bordallo and Rudolph G. Sablan, Pedro C. Sanchez and Esteban U. Torres, and Manuel F.L.