The Mets are at it again, doing that most Mets thing of all: keeping you guessing. Just when you think they’re out of the race, they pull you back in.

The Mets ambushed the Arizona Diamondbacks on Thursday, 11-1, to complete a four-game sweep of another National League wild-card hopeful. After two close victories, the Mets blasted five homers on Wednesday and six on Thursday, a franchise record for a home game.

“We just put everything together,” Manager Mickey Callaway said, praising the defense, the pitching and the offense. “We played good baseball, and when we play good baseball, we can compete with anybody.”

So here they are, 76-70 with 16 games to go, trailing the Chicago Cubs and the Milwaukee Brewers by two games for the second N.L. wild card and the likely prize of a road knockout game against the Washington Nationals. Two other teams — the Diamondbacks and the Philadelphia Phillies — are also within four games of a playoff berth, setting up a tense final two weeks of the regular season.