Drew Brees will definitely be BUSY in retirement -- the QB just announced he signed a massive deal with NBC Sports to cover everything from football to the Olympics.
"I'm gonna be working for NBC," Brees announced Monday on "Today" ... "I'm part of the team now!"
The 42-year-old -- who retired from the NFL over the weekend -- will serve most prominently as a studio analyst for "Football Night In America" on NBC's Sunday Night Football coverage.
Brees' duties will also include game analyst for NBC's coverage of Notre Dame football.