Paul was speaking of himself when he wrote, in Philippians 3:5 - circumcised the eighth day, of the stock of Israel, of the tribe of Benjamin, a Hebrew of the Hebrews; concerning the law, a Pharisee; [NKJV]
Paul was a Pharisee.
No, the Apostle Paul was not a Sadducee. He was a Pharisee before his conversion to Christianity.
Neither
Paul became a Pharisee during Jesus' time. He was actually born a Hebrew of Hebrews, which made him a Pharisee from birth. Paul was one of Jesus' Apostles.
Some of the disciples who were Pharisees include Nicodemus and Paul (formerly known as Saul). They were Jewish religious leaders who followed the teachings of the Pharisees before becoming followers of Jesus.
Paul's father was a Pharisee. His name is not recorded.
Based on the stories about Jesus in the Christian Bible, there are elements of both the Pharisee and Sadducee in his remarks and actions.
Paul who was originally called Saul
There is no verifiable proof of Paul being a Pharisee outside of the Bible. However, some scholars believe that Paul's writings reflect knowledge and understanding of Pharisaic traditions and theology, which may suggest that he had Pharisaic background or training.
Paul was a Pharisee as well as a tent maker.
In the book of Acts, the Bible states that Paul was capturing Christians and personaly persecuting them. This is the exact description of a Pharisee. He was even part of the stoning of Stephen! There's plenty of Extra (outside the) Biblical arguments that Paul is not a Pharisee. All you have to do is search for it. One argument is found in "Paul's Bungling Attempt At Sounding Pharisaic" a chapter from the book "The Mythmaker: Paul and the Invention of Christianity by Hyam Maccoby.
St. Matthew (Levi) was a tax collector. Paul was reportedly a tent maker and Pharisee.
He was a pharisee who were into bringing Christians to be judged and stoned.