NEW YORK Brooks Raley grabbed Francisco Alvarez by the facemask and gave him a brief shake as he headed toward the dudout.After the Mets left-handed reliever exchanged pleasantries with each subject in the dugout, he belted out a line of Francisco Lindor's "My Girl" and settled in among the other pitchers along the railing.Raley is abundantly aware of his reality, as are many of his companions in the Mets bullpen, one of the lone strengths in a disastrous 2026 campaign.Sunday's outing was almost certainly Raley's last with the Mets. He has been a fixture of the team's bullpen and clubhouse for the last four seasons, through an injury-ravaged 2024 and landing back in Flushing one year later amid an unsettled future. On the eve of Monday's trade deadline, Raley, Luke Weaver and Huascar Brazoban, who are each receiving their share of speculation, each tossed a scoreless frame in the Mets' 2-0 loss to the Marlins on Sunday afternoon at Citi Field."I think guys feel it. This is a baseball season, you've got to handle things," interim manager Andy Green said. "For us, our ability to block things out and go out, compete and do what we need to do to win a baseball game. We didn't do that again today."Sure, it's heavy. It's friends walking out the door. At the same time, we got to do a better job playing baseball."Freddy Peralta is first domino to fall in Mets rotationThe series finale was beneath a cloud of uncertainty surrounding the construction of the team beyond Sunday. During the contest, Freddy Peralta was officially traded to the Rays for prospects Aidan Smith, Gary Gill Hill and Emilien Pitrie."I love Freddy. I haven't even had the chance to see him yet. I was managing the game, Green said. "He stepped out of the dugout to receive the news, did not return to the dugout at that point in time. Most guys popped in to see him as quickly as they could while the game was going on out of respect, but we had a game so that's where we were focused."A few miles south in Brooklyn, Clay Holmes was putting the finishing touches off his third rehab start with the Cyclones. The right-hander, who is a top trade candidate, allowed four runs (three earned) on seven hits in 5 innings.The destination for Holmes' next start is very much up in the air."I think we've got to get through the next 24 hours here, figure out what happens. Once we're on the other side of that, that will become much clearer. He has definitely lengthened out to the point where you would expect him to start a major league game going forward."The 36-year-old Robert Stock stepped in to help fill the void on Sunday afternoon, making his first major league start since 2021 and getting back on the big league mound after surgery for thoracic outlet syndrome in March. It was an encouraging display for Stock, who allowed one earned run on three hits with four strikeouts in five innings."His stuff is good. If he's in the strike zone, which he was today, he's tough," Green said. "It was really good to see. He should take a ton of pride in the way he threw the baseball today. It was really good."One last showcase of Brooks Raley, Luke WeaverBefore Sunday's game, Green received assurance that he could deploy his bullpen freely, so in a one-run game late that's what he did.And the Mets' high-leverage contingent performed just as they have all season long to keep the Marlins off the scoreboard.Raley, who is the likeliest to be moved as he approaches free agency, needed eight pitches to record three outs against the top of the Marlins' lineup. Luke Weaver, who might be one of the top relief options if available, given his control through 2027, tossed a perfect seventh with a strikeout of Griffin Conine. And Huascar Brazoban, whose handshakes and hugs in the dugout pregame sparked further speculation, worked around a two-out walk and used two strikeouts to toss a perfect eighth. "Those guys did a great job," Green said. "They kind of continue to prove who they are - some of the best relievers in baseball."The Mets reliever unit, which ranks ninth in ERA and seventh in WHIP in baseball this season, could soon be pillaged. Raley now has a sub-2.00 ERA with nine earned runs in 41 innings (1.96 ERA). Luke Weaver has only allowed one earned run in 32 innings since the calendar turned to May. Brazoban, who has three more years of control, continued his career season.For teams needing bullpen help, Sunday provided one last clear display that the Mets have a stacked inventory to be explored.This article originally appeared on NorthJersey.com: Mets offer one last look at dominant bullpen arms available at deadline