27 February 2018

Goalie League Stats Differences

As part of my Europe goalie analysis I decided it would be interesting to know what the differences a goalie has in their stats when they switch leagues. The leagues I included were SHL, NLA, DEL, Czech Extraliga, Liiga and the AHL (since many players from the AHL to Europe).

What I did

I scraped all the Goalkeepers off of EliteProspects and then went through their stats history and whenever the league changed from the previous row I marked it as a transfer. I noted what their GAA and SVP for both leagues was and calculated the difference. I then wrote these to a csv file for each league.

When reading the csv for each league I selected the rows where both the old and new leagues SVP was present for data to calculate the average mean SVP and I also selected only rows that had GAA for both leagues when selecting the data for the GAA data set. Once the data was select I then discounted the top and bottom quarters of the dataset to avoid edge cases. Then I found the mean.

Reading the data

A positive number is an improvement within the new league. So Goalkeepers going from the SHL to the NLA will on average (according to the mean) have a 1 percent better save percentage. So a 0.91 would become 0.92. While they would have an average 0.27 worst GAA.

SHL

Old League GAA mean SVP mean GAA Sample Size SVP Sample Size NHL -0.03 0.53 12 12 NLA 0.26 N/A 5 0 Liiga 0.19 -1.25 29 29 KHL 0.21 -0.7 11 11 DEL -0.45 0.12 9 9 Czech 0.05 -2.25 4 4 AHL -0.39 0.66 18 19

NLA

Old League GAA mean SVP mean GAA Sample Size SVP Sample Size NHL 0.34 0.83 6 5 SHL -0.27 1 5 1 Liiga 0.39 -0.8 5 4 KHL 0.24 -0.13 5 5 DEL 0.54 -2.7 2 1 AHL 0.34 0.13 8 5

Liiga

Old League GAA mean SVP mean GAA Sample Size SVP Sample Size NHL -0.4 2.25 15 16 SHL 0.08 0.76 21 23 NLA -0.79 0.05 3 2 KHL -0.3 0.32 8 9 DEL -0.92 2.95 4 4 Czech 0.24 0.15 7 6 AHL -0.74 1.72 25 25

KHL

Old League GAA mean SVP mean GAA Sample Size SVP Sample Size NHL -0.72 1.76 19 19 SHL 0.59 -1.29 13 13 NLA 0.02 -1.2 2 2 Liiga 0.36 -1.24 23 23 DEL 0.13 -1.37 5 5 Czech 0.03 -0.94 11 11 AHL -0.2 0.74 29 29

DEL

Old League GAA mean SVP mean GAA Sample Size SVP Sample Size NHL -0.02 0.78 10 10 SHL 0.4 0.35 16 16 NLA 0.32 N/A 4 0 Liiga 0.01 -0.63 13 13 KHL 0.2 -0.02 10 10 Czech 0.44 -2.39 15 15 AHL -0.25 1.27 25 25

Czech

Old League GAA mean SVP mean GAA Sample Size SVP Sample Size NHL 0.14 1.55 6 6 SHL 0.15 1.45 4 4 NLA 0.89 -4.4 1 1 Liiga -0.24 1.32 11 11 KHL -0.29 -0.03 7 7 DEL -0.34 1.35 12 12 AHL -0.27 1.85 4 4

AHL