Contradiction with John 1:35-42
While Mark 1:16 describes the calling of Simon and Andrew while they are fishing, John 1:35-42 depicts Andrew as a disciple of John the Baptist who follows Jesus before introducing Simon to Him, suggesting a different sequence of events.
John 1:35-42: Again the next day after John stood, and two of his disciples;
Contradiction with Luke 5:1-11
In this passage, the calling of Simon and others occurs during a miraculous catch of fish after Jesus preaches from a boat, in contrast to Mark 1:16 which offers no such preceding miracle.
Luke 5:1-11: And it came to pass, that, as the people pressed upon him to hear the word of God, he stood by the lake of Gennesaret,
Contradiction with Matthew 4:18-22
This passage describes the calling of Simon and Andrew similarly to Mark 1:16, but it immediately follows events that are omitted in Mark, such as Jesus' time in Galilee, creating a discrepancy in the narrative context and order.
Matthew 4:18-22: And Jesus, walking by the sea of Galilee, saw two brethren, Simon called Peter, and Andrew his brother, casting a net into the sea: for they were fishers.