How much so? I looked at every kick of Walsh’s career, beginning in his rookie season of 2012. For every made extra point in 2012, 2013, or 2014, I gave him +0.01 points, and +0.06 points for every made extra point in 2015 or 2016. Then, for every miss, he received -0.99 or -0.94 points, as applicable.

Extra points were easy; field goals were slightly harder. The graph below shows the average success rate on field goals in 3-year increments, from 2012 to week 10 of 2016:

I used those numbers to give Walsh points for each field goal attempt, too. For example, 48-50 yard kicks have been made 70% of the time over the last five years, so if Walsh attempted a 49-yard field goal, I gave him +0.9 points if he made it, and -2.1 points if he missed it.

Using that methodology, here is how Walsh has fared in every regular season game of his career:

As a rookie, Walsh was at +11.4 in this system, and would be even higher if I era-adjusted in sample (for convenience, I treated 2012 games the same as 2015 games, which probably is not appropriate). In 2016, he had -7.1 points by this system, including two miserable games in weeks 1 (missed extra point, missed 37-yarder, missed 56-yarder) and 9 (missed extra point, missed 46-yarder in a game the Vikings lost in overtime).