Sports analytics is fun and interesting topic where you can mix your personal pleasure with analytics tools as a profession. Many analysts are finding this area as a new profession and are enjoying what they do.
The sport that gets the most analytical focus is baseball due to its plays are easily dissected into quantifiable metrics.
Here are some interesting finding that I got using Shiny R.
The following are some interesting websites about football analytics.
The following are some interesting websites about basketball analytics.NBA Player Projections
In general, fivethrityeight.com gives some good analytics on various topics.