The Mets expect David Wright back in the lineup, hitting fourth behind Carlos Beltran tonight in Florida. Beltran, on the trade block, isn’t expected to be dealt by game time, but his days as a Met are getting shorter. Getting Wright back will not change GM Sandy Alderson’s thinking regarding Beltran.

The All-Star outfielder is drawing considerable interest, and he’s playing at a rate where he’ll likely command a prospect, not a throwaway player.

Wright went on the disabled list May 18 with a stress fracture in his lower back. He sustained the injury nearly a month earlier.

Even though the Mets have played shorthanded, they managed to tread water. However, the Phillies and Braves have opened up sizeable leads in the NL East and wild-card races that make competing difficult and the Mets are in trade mode.

They’ve already unloaded Francisco Rodriguez and are actively shopping Beltran. Beltran said he’s like to stay with the Mets, but it is all public relations.

Even should Beltran stay, Wright’s return will not greatly improve their status, regardless of what some players believe.

“You forget what he brings, because this has been our team for so long,’’ Jason Bay said. “It’s almost like we’re making a trade. We’re getting a premier player, adding an impact bat, and even though he’s our own guy. It’s going to be big for us.’’

Players say that all the time when a player comes off the disabled list, but even with Wright the Mets didn’t have enough parts, especially on the mound.

If history is an indication, Wright will need a monster night to overcome the disappointing Mike Pelfrey, who is 5-9 with a 4.67 ERA.

If you think that’s bad, consider he’s 1-7 lifetime against the Marlins, including seven straight losses in his last 13 starts against them. He hasn’t beaten Florida since July 8, 2006.