In Game 1, Sanchez threw 116 pitches over six innings. Scherzer departed after seven innings and 109 pitches in Game 2.
"I just knew I was at my limit," Scherzer said. "You have to be smart. It's still early in the series. You have to gauge your health, because my health is important to the team, and I reached my pitch-count limit. I told them I was done."
The Red Sox take great satisfaction in making the other team's starter feel "done."
"That's what we do," first baseman Mike Napoli said. "It's part of our offense. We all work together to try to do something like that. We're not going to try to change anything. We just have to try to square some balls up and get some hits."
Game 3 is Tuesday at 4 p.m. ET on FOX.
Ian Browne is a reporter for MLB.com. Read his blog, Brownie Points, and follow him on Twitter @IanMBrowne. Bryan Hoch is a reporter for MLB.com. Follow him on Twitter @bryanhoch and read his MLBlog, Bombers Beat. This story was not subject to the approval of Major League Baseball or its clubs.