"5. Drew Brees, Saints. The defending Super Bowl MVP will put up big numbers, as usual, but is competing in an improved NFC South, and gets Baltimore and Pittsburgh as well. Tough schedule, but he'll persevere."
The author states he is ranking the NFL's quarterbacks based solely on QB rating - "that complex formula that maxes out at 158.3 and is used to gauge quarterback play" but pushes last years top rated QB into 5th due to a tough schedule.