This year's Open at St. Andrews was by far the most exciting that I have watched. Forgive me for being a big Zach Johnson supporter - I've been the stat advisor to Zach and his team for the past four years.
Please don't tell Zach, but I was also pulling for Jordan Spieth. It bothered me to hear the commentators continually refer to Jordan as a poor putter in the important 5-10 ft. range. I understand that this was intended to build suspense as Jordan stood over these critical putts. But let's put the record straight. First, Jordan is by no measure a "poor" putter. Second, the rationale cited was Jordan's Tour ranking of #87 in that range, which is just WRONG. The ranking number is not wrong, but its use to support the assertion is dead wrong. I decided to write this blog when a good friend (a very knowledgeable golfer - but not a ShotByShot.com subscriber?!) quoted this stat in the context of "... can you believe how bad Jordan is with these short range putts?" I did some homework to set him straight, and realized it was worth sharing. I hope you agree.
Please don't tell Zach, but I was also pulling for Jordan Spieth. It bothered me to hear the commentators continually refer to Jordan as a poor putter in the important 5-10 ft. range. I understand that this was intended to build suspense as Jordan stood over these critical putts. But let's put the record straight. First, Jordan is by no measure a "poor" putter. Second, the rationale cited was Jordan's Tour ranking of #87 in that range, which is just WRONG. The ranking number is not wrong, but its use to support the assertion is dead wrong. I decided to write this blog when a good friend (a very knowledgeable golfer - but not a ShotByShot.com subscriber?!) quoted this stat in the context of "... can you believe how bad Jordan is with these short range putts?" I did some homework to set him straight, and realized it was worth sharing. I hope you agree.
Compaction
First, the Tour maintains a total of 649 Tour Stats. With the exception of the two Strokes Gained stats (Putting and Tee-to-Green), the remaining 647 stats are one-dimensional snapshots of a small slice of performance and can be very misleading. The rankings represent where the player stands relative to his peers. But at this level - the very top of the game - differences are very slight. I refer to it as "compaction." For example, let's examine exactly what Jordan's 87th ranking in the 5-10 ft. putt range really means.
- The #1 ranked player is Troy Merritt (who?) makes 65.15% of his opportunities in this range.
- Jordan's 57.3% is better than the Tour avg. of 56%.
- This stat does not drop below 50% for any player until #190
- The worst player in this range, ranked #196, makes 45% of his opportunities.
- Like most players, Jordan averaged less that three putts (2.7) in this range per round.
- Finally, the range should be 6-10. There is way too much difference in the average make % between 5' 4" and 8 or 9+ ft. so each player's actual spread of distances will influence the result.
Strokes Gained
Jordan Spieth is ranked #6 in this MOST IMPORTANT putting stat. I don't recall this stat being mentioned in the telecast. For those that are unfamiliar, this stat compares the player's
performance for the distance of each putt opportunity to a model of the
average performance of the entire Tour for that distance. It is as
close to perfect as a golf stat can get. For a more complete
explanation see:
How Good is Strokes Gained Putting
The graph above displays Jordan's current Tour rankings from each distance range. For perspective, I added his Strokes Gained Putting ranking (6) in blue. When I average all the Tour rankings by range, Jordan would rank #48. This makes no sense as the vast majority of putts fall into the first three ranges. So I performed a weighted average based upon my educated estimates of the # of putts within each range. In theory, the weighted average should approximate Jordan's overall skill level. Instead it bumps Jordan up to #64 - a long way from his real skill level - #6.
In closing, my plea to broadcasters: If you are going to cite statistics, please understand what they really mean. If you need help, call me!
How Good is Strokes Gained Putting
The graph above displays Jordan's current Tour rankings from each distance range. For perspective, I added his Strokes Gained Putting ranking (6) in blue. When I average all the Tour rankings by range, Jordan would rank #48. This makes no sense as the vast majority of putts fall into the first three ranges. So I performed a weighted average based upon my educated estimates of the # of putts within each range. In theory, the weighted average should approximate Jordan's overall skill level. Instead it bumps Jordan up to #64 - a long way from his real skill level - #6.
In closing, my plea to broadcasters: If you are going to cite statistics, please understand what they really mean. If you need help, call me!
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