Who led Jesus' baptism in the Gospel of Mark?
Gospel of Mark:  It tells of the ministry of Jesus from his baptism by John the Baptist to his death and burial and the discovery of the empty tomb – there is no genealogy of Jesus or birth narrative, nor, in the original ending at chapter 16, any post-resurrection appearances. John the Baptist: John the Baptist (Ancient Greek: Ἰωάννης ὁ βαπτιστής , "Ioánnes (h)o baptistés" or Ἰωάννης ὁ βαπτίζων, "Ioánnes (h)o baptízon", known as the Prophet Yahya in the Quran), also known as John the Baptizer, was a Jewish itinerant preacher in the early first century AD.
John the Baptist