Tom Brady has had a remarkable career, and it doesn’t appear that he’s done adding to his legacy. But for now, I’d like to analyze Brady’s passing performance for each season of his Hall of Fame career.
Every season is different, and some stats do a decent job of describing a player in some years, but fail in others. Passer rating, total yards, touchdowns, and interceptions sometimes work, but can also paint very misleading pictures. But if you want to use one stat consistently, I always suggest using Adjusted Net Yards per Attempt, which is the best basic metric to measure a passer’s performance. ANY/A is simply yards per attempt with a 45-yard penalty for interceptions, a 20-yard bonus for touchdown passes, and appropriate inclusions for sacks and yardage lost on sacks. And if you want to measure ANY/A in different seasons, it’s best to compare a player’s ANY/A average to league average, to get his Relative ANY/A in each season.
I went ahead and calculated Brady’s RANY/A for each season of his career. For example, in 2007, playing with Randy Moss and Wes Welker, Brady averaged 8.88 Adjusted Net Yards per Attempt, the best of his career. The league average ANY/A that year was 5.52, giving Brady a Relative ANY/A of +3.36. Meanwhile, in 2002, a still green Brady averaged just 5.54 ANY/A when the league average ANY/A was 5.35. That gives Brady a RANY/A of +0.19, the worst of his career — which, by the way, was still above league average. Yes, Brady has been a starter for 17 seasons (all analysis today discards his ’00 and ’08 seasons, when he combined to throw 14 passes) and has had above-average passing stats in each year. Remarkable.
The graph below shows Brady’s Relative ANY/A, plotted on the Y-Axis from -4.0 to 4.0, in each season of his career. The first thing that stands out to me is how all of the data is plotted in the top half of the graph: that’s because every season is above average. The X-Axis shows season, with a gap around his injured ’08 campaign. Finally, I have plotted the graph in Patriots red and blue, but placed gold circles around his six Super Bowl-winning seasons: ’01, ’03, ’04, ’14, ’16, and ’18. [continue reading…]