2018
The best year of this decade was arguably the best in franchise history. The Red Sox had won consecutive division titles but after being bounced in the ALDS both times, manager John Farrell was let go and replaced with Alex Cora. Known for his communication skills and rapport with his players, Cora quickly improved the clubhouse culture.
It helped that the front office upgraded the roster as well. After suffering a drastic power outage the previous year, the Red Sox rectified their lineup issues by signing J.D. Martinez in free agency. Nobody could ever replace David Ortiz but Martinez did a solid impersonation by slugging 43 home runs. He hit .330 and led the league with 130 RBI while making a strong push for the Triple Crown.
Improving the lineup around him did wonders for Mookie Betts. He won the batting title with a .346 average while also leading the league with a .640 SLG and 129 runs scored to earn the AL MVP.
The Red Sox cruised to a franchise record 108 wins on their way to a World Series title. They crushed the rival Yankees in the ALDS and got revenge on the Astros in the ALCS. Boston went on to defeat the Dodgers in five games with their only loss coming in an epic 18-inning marathon which established Nathan Eovaldi as a postseason hero for his gutsy bullpen performance.
David Price exercised his playoff demons by finally winning a postseason start against the Astros. He added two more wins against the Dodgers and arguably should have earned World Series MVP honors.
There were many memorable moments over this past decade but nothing tops a championship parade. The Red Sox were fortunate enough to celebrate two World Series titles in that span but the season that included the most wins in franchise history gets the nod as the best year of the decade.