Washington Nationals’ lineup for this afternoon’s series finale with the New York Mets...

Victor Robles tracked a ball to the GEICO wall in center in Saturday’s game, but wasn’t able to make a catch on a leaping attempt on what ended up an RBI triple.

He had a bad read/first step on a liner to center field he might not have caught anyway in the second inning as well, but the bad jump cost him any opportunity of getting to it.

Robles then hit solo home run to left on an 96 mph sinker from Mets’ right-hander Noah Syndergaard to lead off the Nationals’ half of the third, and in the fifth he hit a single off Syndergaard ... after which he got picked off first.

It’s been a bit of an up and down start for the 21-year-old outfielder, who had a baserunning gaffe in the first game of the season on Thursday as well.

“He’s going to get better,” Nats’ skipper Davey Martinez said after the Nationals fell to 0-2 after the second consecutive loss to the Mets.

“He’s going to get better. You’ve got to remember, he’s 21 years old and he’s playing in the big leagues. I’ve been there, and I know that, know the struggle. He’s going to get better.

“He talks about it and he wants to get better. It’s just a case where instead of breaking back, he came straight up before, and the ball was hit hard, so but he’s going to get better. I like his intensity, I like the way he’s swinging the bat, and he’s going to get better out there.”

Martinez was asked if he thought the Robles might be pressing early.

“He’s just a young kid,” the manager said, “just trying to right now piece it all together, and it’s going to come, it’s going to come. I think he wants to do a little more right now. It’s two games. When he got on first base [on the single], [First Base coach Tim Bogar] told him, ‘Hey, watch the pickoff,’ and he got picked off, so the little things like that, we’re going to clean it up with him, but what I see is someone who is going to help us win a lot of games.”

Robles is back in there this afternoon for the finale of the three-game set with the Mets, as the Nationals try to avoid getting swept in the season-opening series.

HERE’S THE NATIONALS’ LINEUP FOR TODAY’S GAME: