You love sports. You love data. If you've ever gone on an epic journey in search of sports data, you've probably resorted to scraping data from sites like ESPN or Baseball Reference and have spent countless hours writing Python code to use the powerful web scraping library BeautifulSoup. Maybe you even have a nice Python client that scrapes stats.nba.com or you wrote an R package to scrape Baseball Reference. However, we all know that websites get redesigned, formats change and sometimes access to specific stats is revoked (e.g. the NBA did this with player movement tracking but attributes it to 'technical difficulties'). Suddenly, you are scrambling to update your scraping code in order to account for a few new divs or other elements on the web page that were renamed.
This is where the Stattleship API comes to the rescue. We've built an easy-to-access set of sports data, stats and accomplishments for multiple sports (and expanding). We've partnered with Gracenote to provide all of our NFL, NBA, NHL and MLB game data. Our service is designed for creative fans who want to use Stattleship data to build sports apps that scale.
We've cleaned, structured, and categorized all of the box score, player stats and game log data for you. We've even quantified specific performances and feats so that you can quickly identify whether a stat is a common-place occurrence or a record-breaking achievement. What would you do if you could instantly pull in all current MLB box scores, player salaries and team statistics right into R? What would you build with venue capacity and attendance in conjunction with win/loss results by team?
In this tutorial, we will show you how to use our R wrapper to access live and up-to-date sports data via the Stattleship API. There is also a Ruby gem for all of you Rubyists: https://github.com/stattleship/stattleship-ruby
There are a few main endpoints that we will focus on. They are as follows:
- games - contains game information such as date, attendance, scoreline, etc.
- players- contains player information such as name, position, draft round, school, salary, weight, birthday, etc.
- teams - contains team information such as name, division, colors, hashtags, etc.
- game_logs - contains player-level game log information such as Kevin Durant's assists from a specific game, total minutes played, etc.
- team_game_logs - contains team-level game log information such as total points, rebounds and turnovers by the Boston Celtics in a specific game
Here's a basic Entity-Relationship Diagram outlining how these objects relate to one another:
In order to get started, sign up for a free API token from here. Now load up RStudio and start following along!
The first few lines of this R script will install the R package from Github to your machine:
If you don't have
devtools installed you will have to install that first.
install.packages("devtools") devtools::install_github("stattleship/stattleship-r") ## Load the stattleshipR package library(stattleshipR)
Next you need to set your API token in the R environment:
Now we need to specify the sport, league and endpoint we are interested in. In this case we will fetch all MLB regular season game logs for the Red Sox to date. This is as easy as setting three parameters:
ep for endpoint.
sport <- 'baseball' league <- 'mlb' ep <- 'game_logs'
This last parameter, called
q_body is where we can set more granular options such as requesting a specific team, stat, player or season.
q_body <- list(team_id='mlb-bos', status='ended', interval_type='regularseason', season_id='mlb-2016')
Now that all of our parameters are set, we can use
ss_get_result to send our request to the Stattleship API. Notice the
walk=TRUE option. This ensures that the request will walk through all pages of results and return everything. Results are returned 40 rows per page.
Note: This example is for the 2016 MLB season. When 2017 begins, you can use
gls <- ss_get_result(sport=sport, league=league, ep=ep, query=q_body, walk=TRUE)
We now have a list in R that has 5 elements (there were 5 pages of results returned).
> length(gls)  5
We want to combine all of the pages of results into one
game_logs<-do.call('rbind', lapply(gls, function(x) x$game_logs))
Let's check out all of the data we now have access to from yesterday's games:
Wow, over 80 variables for each player including strikeouts, walks, doubles, runs, and more.
I want to include player information into this data set though so I have more than just
player_ids. Let's retrieve all Boston Red Sox players by changing the
players and pass
team_id='mlb-bos' into the options list.
sport <- 'baseball' league <- 'mlb' ep <- 'players' q_body <- list(team_id='mlb-bos') pls <- ss_get_result(sport=sport, league=league, ep=ep, query=q_body, walk=TRUE) players<-do.call('rbind', lapply(pls, function(x) x$players))
In order to merge the two data.frames we can simply rename the
id column to
player_id so we can use
merge in R like this:
colnames(players) <- 'player_id' game_logs <- merge(players, game_logs, by='player_id')
Now let's do some basic player calculations using
install.packages('dplyr') library(dplyr) ## Only include game_logs where a player actually played the game, calculate mean batting average, ## total runs, total bases and pull in salary info stats <- game_logs %>% filter(game_played == TRUE) %>% group_by(name) %>% summarise(totalRuns = sum(runs), meanBA = mean(batting_average), totalBases=sum(total_bases), salary=max(salary))
Good! Now let's plot it all using
ggplot(stats, aes(x=totalRuns, y=meanBA, size=totalBases, label=name, color=salary)) + geom_text()
This plot actually enables us to visualize 4 different variables at once. The x and y axes display total runs and mean batting average, the size of the labels indicate how many total bases the player has had, and the color indicates salary. Xander Bogaerts and Travis Shaw are looking like quite a bargain at this point in the season already.
Let us know if you build anything cool with this awesome sports data API! We also welcome contributions to our R wrapper via pull requests in Github. We have a public Slack channel as well where you can join us to talk sports, data, get R or Stattleship API help, and provide feedback: https://fanboat.stattleship.com/
Here's a link to the full R script from this post: https://gist.github.com/tcash21/3a3b103386e1115aee6aa6ea6add072a
End your sports data scraping woes, start Stattleshipping!
This was a very basic tutorial and doesn't illuminate all of the stats that are available via the Stattleship API, but take a look at our documentation to read up on the possibilities: developers.stattleship.com.
Additionally, here are a few examples of what's been built with the Stattleship API:
- Oglethorpe, stat infographics otherwise known as StatShots - https://oglethorpe.stattleship.com/photos?photo_type=CurrentWinningStreakPhoto
- NFL Yardage by Team 2015 - http://22.214.171.124:3838/statship-app/
- Fanduel NBA Optimizer - https://tcb-analytics.shinyapps.io/dfsoptimize/
- Glickman Statmoji slackbot - https://github.com/stattleship/glickman