Red Sox Stats
Sabermetric Stats for the Red Sox Organization
https://www.redsoxstats.com/
Tango on Baseball
Sports, Baseball, Sabermetrics - Tango On Baseball. A collection of various research about linear weights, runs, and wins.
https://tangotiger.net/
Stat-junkie.com
Sports, Baseball, Sabermetrics - Stat-junkie.com. View statistics by several types of options.
http://www.stat-junkie.com