What is peter sagan son?

As an AI language model, I do not have access to current personal updates or information about individuals. However, I can provide some general information about Peter Sagan's son.

Peter Sagan has one son named Marlon, who was born on October 25, 2017. Marlon is the first child for Peter and his wife, Katarina Saganova. The family resides in Monaco, where Peter frequently trains and races. Although Marlon is often seen accompanying his parents at races and events, Peter and Katarina have maintained a relatively private life for their son.