WASHINGTON - Righthanded reliever Jeurys Familia will have arthroscopic surgery Wednesday to remove bone spurs and loose bodies from his right elbow.

The 23-year-old made his first Opening Day roster this season, pitching to a 3.48 ERA in eight appearances in two stints with the Mets. He also collected his first big-league save but had been sidelined since May 8 with right biceps tendinitis.

The team's medical director, Dr. David Altchek, will perform the procedure at the Hospital for Special Surgery.

Kirk raking

Kirk Nieuwenhuis could be in position to take advantage of a Mets outfield that remains very much in flux.

Nieuwenhuis' recent surge at Triple-A Las Vegas has caught the attention of the Mets, said Terry Collins, who discussed the outfielder during a conversation with 51s manager Wally Backman.

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"His swing is getting a lot better," Collins said, sharing Backman's report. "He's certainly more aggressive with two strikes and . . . we know how good a defender he is."

Despite missing time with a knee injury in spring training, Nieuwenhuis opened the season with the Mets, then was sent down to get regular playing time. In his last 10 games with Las Vegas, he's hitting .348 with four homers.

Meanwhile, the addition of veteran Rick Ankiel has done little to improve a Mets outfield that has posted a combined .681 on-base plus slugging percentage, the second- lowest mark in baseball. Niese holding

Jonathon Niese (shoulder tendinitis) had his bullpen session pushed back to Wednesday. He had been slated to throw Tuesday. Collins said Niese could remain on track to rejoin the rotation Saturday.

Wright second at third

Catcher John Buck (third) and third baseman David Wright (second) ranked in the top five at their positions in All-Star Game voting for the Mets.