You walk into the locker room after another devastating loss, seeking perspective, insight, emotion, a sense of time and place from a player who has been around, knows the Giants culture, been part of the winning and the losing.

In the past, this was a shopping spree, the shelves stocked with quality merchandise. Nowadays, it’s picking over the discount racks.

Suspect talent, questionable decision-making and lack of poise at crucial moments are the main reasons why the Giants are where they are, locked in a three-way tie for first place in the NFC East with matching records of 5-7, an unholy trinity of Giants, Eagles and Redskins all conjuring up sad yet somehow comically can’t-miss unwatchable football. Someone has to win it, and maybe it will be the Giants, despite their glaring lack of someone, or two or three, to rally around and point the way.

When the Giants were the Giants, Tom Coughlin had lieutenants in the locker room, trusted players and leaders to make sure the message was not only heard, but understood. The 2015 edition does not have much of a core to lean on. It is more of a collection than a team, guys just arrived, others headed out the door, very few franchise-building players who were here and will stay here.

Everything revolves around Eli Manning from a responsibility and financial standpoint, but he’s never been an emotional barometer. The respect factor from his teammates is unquestioned, but he’s 10 years older than many of them and always has felt his job is to prepare, direct and show up every day.

You want to get Eli to roll his eyes? Talk to him about getting guys pumped up or giving motivational speeches. Rookie offensive lineman Bobby Hart was thrust into his first real NFL action during the game against the Redskins at FedEx Field, and Manning was asked what words of encouragement he offered as Hart hit the huddle. Manning smirked a bit. “Kind of just, ‘Get lined up, let’s play some football,’ ’’ Manning said.

The most accomplished player on defense, Jason Pierre-Paul, missed the first 10 games dealing with the fireworks accident that permanently disfigured his right hand; he is joining this show well after intermission. Plus, he’s JPP, in many ways a big, smiling kid who is not going to jump ugly with anyone about anything.

“I’m not the type of guy that does a lot of talking,’’ Pierre-Paul said. “I let my play do the talking for me. As far as other guys, if they follow, they follow.’’

Who is there to follow?

Prince Amukamara is a solid player with a Super Bowl ring, but he was once dumped in a cold tub by Pierre-Paul and admits he’s not the one to lead, serving up as evidence some revealing commentary about the postgame locker room after the overtime loss to the Jets. Coughlin, as per usual, told his players he took responsibility for the loss. In the past, Amukamara recalled, when Coughlin went the “Blame me’’ route, Antrel Rolle interrupted his head coach, loudly stating, “No, blame us, hold the players accountable.”

Amukamara said his inclination was to follow Rolle’s lead. “It made me want to say it, but that’s not my role,’’ said Amukamara, who did not appear on his Tuesday WFAN spot that once was Rolle’s. Amukamara’s agent informed WFAN he will not continue appearing on the station this season.

It has to be someone’s role, doesn’t it? Odell Beckham Jr., the best player and only star on the team, delivered a passionate message after the loss to the Redskins. Beckham, though, is 23, in his second season and, despite his on-field brilliance, not ready to take ownership of the team.

Cullen Jenkins is a wise veteran, but all he’s known since coming to the Giants three years ago is losing. Dominique Rodgers-Cromartie is the best defensive player, but he wants no part of it — that might be one of the reasons he’s been on four teams in his eight-year career. Robert Ayers is passionate, but he hasn’t been around long enough. Offensive linemen Weston Richburg and especially Justin Pugh have potential, but they’re young guys finding their way in the league. Rashad Jennings tries, but he’s had marginal success on the field and also just arrived a year ago. Zak DeOssie has two Super Bowl rings and an Ivy League education, but he’s the long snapper.

The loudest voice on defense, Jon Beason, is on injured reserve, out of sight. Victor Cruz, a respected player and Super Bowl winner on offense, is on IR again, out of sight. Michael Strahan, Antonio Pierce, Shaun O’Hara and David Diehl can be seen on TV. Chris Snee is watching his boys play sports. Osi Umenyiora is in London. Justin Tuck is in Oakland, on IR. Antrel Rolle is nursing a bad knee in Chicago.

And guys like Pierre-Paul are looking for them.

“The faces have changed,’’ Pierre-Paul said. “We have vocal leaders, but like I say, I’m not a vocal person, my play does my speaking, and that’s basically it for me. You’ve got other guys, they like to talk and stuff, but I’m more of a ‘do it all on the field, don’t say it.’ You’ll see every Sunday who’s putting their heart out there, so that’s basically it.’’

What the Giants are putting out on Sundays is not good enough. There are many reasons for that. Count a leadership void as one of those reasons.