Stephen, which is also the name of Joe Flacco's father, weighed 8 pounds. Flacco said his wife and son are doing well.
Flacco left the Ravens' mandatory minicamp Wednesday when his wife went into labor. This is the first child for Flacco and his wife.
Flacco isn't the only quarterback in the division who is having a baby this year. Steelers quarterback Ben Roethlisberger and his wife, Ashley, announced last week that they are expecting their first child. Roethlisberger declined to give a due date.