Traditionally, winning teams are built for strength up the middle: catcher, pitching, second base and shortstop, and center field.

That’s not looking good so far for the Mets, especially with center fielder Andres Torres sidelined with a strained calf muscle.

With minor league prospect Kirk Nieuwenhuis suffering with a strained oblique, manager Terry Collins will experiment with infielder Jordany Valdespin and Jason Bay in center. I can see Bay, but Valdespin is total desperation and an indictment on the Mets’ lack of depth and foresight to bolster the position.

Second base is a concern because of Daniel Murphy’s lack of experience at the position. He’s awkward around the bag and doesn’t have consistent footwork. Meanwhile, there’s no doubt about Ruben Tejada’s defensive prowess at shortstop, but there is the matter of playing a full season.

As for the pitching, both the rotation and bullpen are deep with questions and concerns. This isn’t a strikeout staff and still walks more hitters than it should. As for the bullpen, it is patchwork with no proven lefty.

Josh Thole came up with a lot of potential, especially at the plate. He’s still relatively new at the plate and it shows with his ability to call a game and block pitches. He is still far away from being proven.