As an orator, Messalla was thought to be respectable. In 80 BC he was engaged in collecting evidence for the defence in the cause of Sextus Roscius of Ameria. In 62 BC he solicited Cicero to undertake the defence of his kinsman, Publius Cornelius Sulla. In 54 BC he was one of the six orators whom Marcus Aemilius Scaurus retained on his trial.[2]
Messalla married a woman named Polla, by whom he had a son, Marcus Valerius Messalla Corvinus and two daughters, both named Valeria, who married Quintus Pedius and Servius Sulpicius Rufus, the son of the consul of 51 BC (also named Servius Sulpicius Rufus), respectively.[3]