Quintus Caecilius Metellus Pius
Although having failed once to be elected praetor, Livianus tried again, achieving the office by 81. He ran for the office of consul in 77, achieving it only after Gaius Scribonius Curio withdrew his candidature for that year in favor of Livianus. Neither Mamercus nor his consular colleague accepted a proconsular command in Hispania to help Quintus Caecilius Metellus Pius in the Sertorian War. There is no evidence that he obtained a provincial command after his term was concluded.