The first inning was all you needed to see.

The Mets’ (18-20) journey to rock bottom reached another level during their 5-0 loss in the rubber match of a three-game set against Cincinnati Reds on Thursday afternoon.

Kodai Senga dug the Amazins into a hole from the get-go. The 30-year-old surrendered four runs in the top of the first as the Reds strung together a series of hits and walks capped off by Kevin Newman’s two-RBI single.

The right-hander managed to provide Buck Showalter some length going five innings but surrendered a solo shot to Spencer Steer as a parting gift in the bottom of the fifth. That left his final line at five innings with five earned runs and seven strikeouts.

Senga’s season ERA took a jump above four (4.14) with his ugly performance.

The Amazin’s lineup, however, did virtually nothing to make it a contest. The club mustered just six hits on the afternoon and one with runners in scoring position off the bat of Francisco Lindor to right field. But that resulted in Francisco Alvarez getting gunned down at the dish by Henry Ramos to end the top half of the seventh.

Alvarez’s performance at the plate was the lone bright spot of the afternoon. The rookie continued his hot stretch going 2-for-4 with a double, the team’s only extra-base hit of the afternoon.

The backstop is 6-for-15 (.400) over his last five games. The 21-year-old ranks in the 91st percentile in framing according to baseball savant as he appears to be coming around during his second stint in the big leagues.

Showalter’s squad has now gone six straight series without coming out on top. The last time they won two consecutive games was April 20-21 against the San Francisco Giants.

The club will try to right the ship beginning Friday as they take a trip to our nation’s capital to square off against the last-place Washington Nationals (16-21) at 7:05 p.m. Tylor Megill is scheduled to take the ball against southpaw Mackenzie Gore.

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