FWIW I've implemented a simplistic WAR in a baseball video game I wrote, so I am well aware of what it is :) > Well there's infinite ways to combine peak and c

FWIW I've implemented a simplistic WAR in a baseball video game I wrote, so I am well aware of what it is :) > Well there's infinite ways to combine peak and career totals, and "10 years of 1 WAR is equal to 1 year of 10 WAR" is certainly one of them. That means that you can imagine many different ways of calculating overall career quality, even if you restrict yourself to just using WAR values. Summing up all the seasons is one of them. Others might give some additional value for exceptional seasons. For instance https://a.espncdn.com/magazine/1224NBAHOB.pdf https://a.espncdn.com/magazine/1224NBAHOB.pdf as a simple example. I use a similar formula for Hall of Fame eligibility in my video game.