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7/18/2014 10:12 P.M. ET

Niese expects to return from DL for Monday start

SAN DIEGO -- Left-hander Jon Niese "felt good" after throwing 28 pitches in a bullpen session Friday, keeping him on track to come off the disabled list and start Monday in Seattle.

Though Mets manager Terry Collins will not commit to Niese as his starter before seeing how the left-hander feels this weekend, Niese said he's "certain 100 percent I'm throwing Monday."

The Mets' best first-half pitcher, Niese has been on the DL since July 5 with what the team termed a left shoulder strain. A subsequent MRI revealed inflammation in the A/C joint of his shoulder.

Niese, who missed significant time this spring with shoulder and elbow issues and began the season on the DL, was 5-4 with a 2.96 ERA in 17 starts between injury stints.

Road trip to help GM choose course for Trade Deadline

SAN DIEGO -- Thirteen days before the non-waiver Trade Deadline, Mets general manager Sandy Alderson painted the picture of a Mets team more likely to buy than sell -- should the club decide to do anything at all.

"I think we have flexibility," Alderson said. "It depends on where we are and how we're performing."

Coming into this month, the thought of the Mets trading away young pieces for established veterans seemed outlandish, considering their steady slide toward the bottom of the National League East. But the Mets won eight of their final 10 games leading into the All-Star break, lifting them to within seven games of the division-leading Nationals and Braves.

Whether the Mets can retain that momentum coming out of the break will go a long way toward determining what Alderson does or doesn't do at the deadline.

"The next 10 days or so are going to be as important, if not more important, as the last 10 before the break," the GM said. "It was nice to go 8-2, but we've got a lot of ground to make up. It will be important to put wins on the board the rest of the way. I think that will give us a good idea."

The Mets enter the second half of July with few glaring roster needs, but several areas in which they could stand to improve. Most notably, the team would do well to add an established everyday left fielder to their lineup; right now, manager Terry Collins is juggling four players -- Kirk Nieuwenhuis, Eric Young Jr., Chris Young and Bobby Abreu -- in and out of that one spot.

Yet to add such an offensive player would likely require the Mets to trade away useful prospects -- something Alderson has been loath to do throughout his tenure. It is exceedingly unlikely that the Mets would add any veteran not under team control beyond this season.

"I don't like to trade young players," Alderson said, "but sometimes you have to."

Adding pieces at the deadline would also require a leap of faith for a Mets team not expected to compete for a playoff berth coming into this season.

"Sometimes you've got to believe, right?" Alderson said. "This is a time."

For now, Alderson will wait and see. It appears all but certain that the Mets will not deal away established veterans Daniel Murphy or Bartolo Colon unless they slide rapidly down the standings during their first road trip out of the break, a 10-game swing through San Diego, Seattle and Milwaukee. By continuing to win, the Mets could ensure that Alderson will at least attempt to add pieces at the deadline.

"I don't know if there's any magic formula, but certainly they played great coming into the break," Collins said of the Mets. "I think they all needed to rekindle some energy, and hopefully we come out of that break playing the same way."

Top pick Conforto set for pro debut with Brooklyn

SAN DIEGO -- Mets first-round Draft pick Michael Conforto is scheduled to make his professional debut as a designated hitter Saturday with Class A Brooklyn.

Conforto, whom the Mets officially signed on July 11 after selecting him 10th overall in the 2014 First-Year Player Draft, hit .345 with seven home runs in 59 games in his final season with Oregon State. He was named one of five finalists for the Dick Howser Trophy, awarded annually to the top college player in the country. Conforto was also named the Pac-12 Player of the Year for the second straight season and was the first three-time All-American in Oregon State history.

"Besides the fact that Michael is an all-around outstanding player from our point of view," general manager Sandy Alderson said, "his outstanding on-base approach as well as his left-handed swing and the power potential that he brings [is] sort of a natural fit for our organization in this ballpark as a gap-to-gap-type of hitter. We're extraordinarily pleased to have him."

Anthony DiComo is a reporter for MLB.com. Follow him on Twitter @AnthonyDicomo. This story was not subject to the approval of Major League Baseball or its clubs.