Patriots quarterback Tom Brady's four-year contract extension includes a $16 million signing bonus, according to a source. Brady had his base salary in 2010 increased to $7.5 million. He will earn base salaries of $5.75 million in 2011; $5.75 million in 2012; $9.75 million in 2013; and $9.75 million in 2014. Meanwhile, Brady has roster bonuses of $4 million in 2011, $6 million in 2012, $5 million in 2013 and $5 million in 2014. He can also earn $250,000 workout bonuses in 2011, 2012, 2013 and 2014, adding another possible $1 million to the pact.