I recall this exchange we had back in January:
http://www.talksox.com/forum/threads/17790-The-Benintendi-Thread/page73
Through Friday's games Robinson Cano, Nelson Cruz, Kyle Seager and Jean Segura had combined for 13.5 fWAR while Mookie Betts, Dustin Pedroia, Jackie Bradley and Xander Bogaerts has combined for 12.4 fWAR:
https://www.fangraphs.com/leaders.aspx?pos=all&stats=bat&lg=all&qual=y&type=8&season=2017&month=0&season1=2017&ind=0&team=11&rost=&age=&filter=&players=
https://www.fangraphs.com/leaders.aspx?pos=all&stats=bat&lg=all&qual=300&type=8&season=2017&month=0&season1=2017&ind=0&team=3&rost=&age=&filter=&players=
Most importantly, the Red Sox have won the AL East title while the Mariners are on the postseason sidelines for the 16th straight year after posting a losing record.
As a side note, this year Mookie Betts and Chris Sale are the only Red Sox players who have posted a higher fWAR than Seattle catcher Mike Zunino.