DENVER — Craig Kimbrel didn’t record an out until he faced his fifth batter Thursday, by which time the Mets’ sweep dreams had been obliterated. It was an afternoon in which the Mets lineup, after a recent uptick, went dry and then haywire in the eighth inning when Kimbrel entered a tie game against the Rockies and loaded the bases. Jake McCarthy’s ensuing grand slam sent the Mets to a 6-2 loss at Coors Field that snapped their three-game winning streak. Kimbrel, chosen to pitch the eighth a day after the Mets emptied their bullpen and then went heavy on relief following a short Christian Scott start, threw a 94-mph fastball that McCarthy hooked around the right field foul pole — with the home run call upheld on replay — leaving the Mets situated in a Rocky Mountain low. The Mets fell to 4-2 on the road trip as they begin a three-game series Friday at Arizona. Kimbrel allowed singles to TJ Rumfield and Troy Johnston to begin the winning rally before walking Willi Castro to load the bases.…