Unless you are speaking in the spiritual sense, that is not true. Paul and Luke did not become Apostles until years after the Resurrection.
Four hundred years.
And given the proximity of time and location of Paul and Jesus' lives, as well as considering Paul's prominence in the Pharisaic sect (he studied under Gamaliel), it is unlikely that he knew nothing of Jesus. On the contrary, he disagreed violently with Jesus until the time of his conversion by Jesus.