Saturday’s rain didn’t provide relief for the Mets’ stench. Left to play a doubleheader Sunday against the equally uninspiring Rockies, manager Carlos Mendoza’s crew flatlined in a 3-1 Game 1 loss at Citi Field that gave the Mets a series defeat. The Mets, who managed only four hits, took a shot at a late rally, but it fizzled in the eighth. After Juan Soto walked to load the bases with one out, Luis Robert Jr. popped out and Mark Vientos struck out, eliciting boos from the crowd. The Mets lost for the 14th time in 16 games and had struggling Kodai Senga scheduled to start in the nightcap. Nolan McLean was removed after five innings in which he allowed two runs, one unearned, on five hits and two walks with seven strikeouts. The start matched McLean’s shortest of the season — he also went only five innings against the Pirates in his initial outing. Mets first baseman Mark Vientos strikes out with the bases loaded in the eighth inning against the Rockies on April 26, 2026.…