St. Augustine was also for a lot of Catholic doctrine. I find it funny that many ill-read Calvinists think that Augustine was in any was a precursor of Calvin!
In all of his writings against Plegius Augustine took the position of Sola Fide. He specifically rejected even the semi-Pelagianism which the Catholic church clings to today. Calvin documents it very will in the Institutes and it’s right there in his collected writings against Pelagius.