During an 8-1 thrashing from the Mets, it was the Reds who seemed to be among the walking dead, offering little opposition against Jacob deGrom in his penultimate tuneup prior to the postseason.

The Mets’ junior varsity went on a tear.

First baseman Joey Votto got handcuffed on a grounder, his third-inning error opening the door for the Mets.

The Mets, who’ll go for their 90th win on Tuesday in Philadelphia, started the day with a half-game lead over the Dodgers for home-field advantage after the NLDS begins on Oct. 9.

Despite starting the season with no innings limits, deGrom’s 6.41 ERA in his previous five starts gave the Mets reason to give him more rest.

The Reds didn’t score until the sixth on Votto’s RBI single, which came with the Mets leading 8-0.

The Mets arrived in Cincinnati on Thursday coming off a 3-6 homestand.

In the series sweep, the Mets outscored the Reds 36-12.