How Canada and the US differ in their roster philosophies during Olympic cycles

While the 2022 Beijing Winter Olympics are still over a year away and the memories of Pyeongchang are still fresh in many fans’ minds (with only one World Championship taking place since then) centralisation for both Canada and the USA is rapidly approaching. Countries historically pick their rosters around late May, beginning of June in the year prior to the Olympics to allow time for players to train, bond and participate in exhibition games before the final roster selection occurring just a month before the big event. What goes on during those 9 months prior to skating out of that Olympic ice surface is largely kept a secret with roster decisions often being announced in a somewhat cut-throat manner and additional players often being drawn in from outside the bubble to the surprise of everyone. Throughout this article, we will be looking at the survival rates of skaters on National Teams over the past 30 years and investigating what this means for roster selection heading into Beijing.

In 2018 between the two teams there were only 3 first time players. Cayla Barnes and Sidney Morin both lined up for the USA on the big stage while Sarah Nurse did the same for Canada. That is of course not to say these players didn’t have prior international experience. Nurse made her national team debut at the 2015 4 Nations Cup and had also represented Canada at a U18 level. Cayla Barnes while just 18 at the time of centralisation had played for the United States 3 times at U18’s including Captaining them to a Gold medal that very year while Morin had previously represented the USA at the 2017 The Time Is Now Tour. While there were only 3 ‘true’ rookies between the two teams that was not to say this was the same line-up as the previous Olympic in Sochi with Team Canada having 8 players missing from their gold medal-winning Sochi side, and the USA missing 7.  I have put their names below as we will return to them later.

CANADAUSA
Caroline OuelletteAlex Carpenter
Catherine WardAnne Schleper
Gillian AppsJosephine Pucci
Hayley WickenheiserJulie Chu
Jayna HeffordKelli Stack
Jennifer WakefieldLyndsey Fry
Lauriane RougeauMichelle Picard
Tara Watchorn 
Skaters from the 2014 rosters not included in the 2018 rosters
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Building a Shot-Plotting App in Shiny

For me at least, hand tracking is 99% of the time born out of necessity. 

The only way I am ever going to get location data for shots is if I break out a multicoloured pen and write down all the locations and numbers myself. Its isn’t however exactly the quickest process to deal with.

I actually really enjoy hand tracking is the thing, It keeps me focused on the game at hand and stops my mind from wandering. The issue comes when it’s time to digitise that information for analysis. I have written about this before over at The Ice Garden, back when I tracked an entire season of the Australian Womens Hockey League. That season it took me around an hour of straight work to plug in every piece of information so that tableau could process it and as my life got busier, the amount of free time I could dedicate got less and less. 

The idea to force a shiny app to do something it has no right to do came out of necessity. Partially because I wanted to be able to show heat maps to the Head Coach of the local team I work with during intermission, but mostly because my Masters project consists of getting school kids ages 11+ involved in sports analytics and I really wanted them to be able to produce their own heat maps and yet I really did not want to attempt to explain the complexities of Kernel Density Charts to a collection of 12-year-olds.

So here we are. 

The Hockey Plotter 1.1

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