T.J. Watt's locker is hidden away in the front corner of the Steelers' locker room at the Rooney Sports Complex.
Just poke your head in without peering around and you might not notice him. And that's the way he likes it. Watt doesn't exactly like attention.
But it's getting harder and harder to avoid -- almost like a Watt sack.
He has 10.5 in 10 games this season, including at least half a sack in seven consecutive games. That's the longest current streak in the NFL and the second-longest in team history behind LaMarr Woodley's 10 consecutive games accrued over the course of the 2009 and 2010 seasons.
No doubt, people are taking notice of the youngest of the three Watt brothers and the next in a long line of great Steelers outside linebackers.
"T.J., his relentless effort, he’s a physical guy," said Bengals head coach Zach Taylor, whose team faces the tall task of blocking Watt Sunday in Cincinnati. "He gives everything he’s got every snap. Really, you see that from the whole defense. You start with the front and move it all the way back.
"Him and (Bud) Dupree on the edges cause problems. You’ve got Cam (Heyward) inside. You’ve got plenty of depth everywhere. They’ve done a really nice job defensively, playing with a lot of energy and creating a lot of turnovers and swaying some of these games for them."
The Steelers' defense seems to feed off Watt's energy.
"T.J's been playing well for us," said defensive coordinator/outside linebackers coach Keith Butler. "He studies the game. He makes his teammates accountable. He's a good team player and teammate. He does have an effect on our defense.
"He's probably got to play the run game a little better, but I wouldn't trade him."
It used to be J.J. Watt, the eldest of Connie and John Watt's three sons, was the player NFL teams feared the most. And for good reason. After all, J.J. Watt has won NFL Defensive Player of the Year three times.
But T.J. Watt has positioned himself to be in that conversation this season with his 10.5 sacks, 35 tackles, four forced fumbles, three fumble recoveries and league-best 22 quarterback hits.
The scary thing for opponents is that Watt, who just turned 25 in October, is still getting better.
"I’d be a fool to say I’m where I want to be. I’m just trying to maximize my potential week in and week out," Watt told me. "There’s so much film that I watch on myself week to week after games. There are so many plays left out there that I want to make. It’s just wanting to get better every day. That’s the great thing about football. You’re never going to reach that potential, but you strive for it every day."
That desire to be great has driven Watt's improvement each season he's been with the Steelers, who selected him with the 30th pick in the 2017 draft.
He recorded 52 tackles, seven sacks an interception and one forced fumble as a rookie in 2017. Then, he had 68 tackles, 13 sacks and six forced fumbles in his second season, earning his first trip to the Pro Bowl. His 20 sacks in his first two seasons were the most by a Steelers player in his first two seasons in the league.
Watt's 30.5 sacks since the start of the 2017 season are tied for the fourth most in the NFL in that span, behind only Chandler Jones of the Cardinals, Aaron Donald of the Rams and Cameron Jordan of the Saints.
"He's unbelievable," J.J. Watt said Thursday night on FOX Sports' NFL pre-game show. "It's so much fun to watch him. T.J. always told me he wants to come for my NFL Defensive Player of the Year titles. I brushed him off as my little brother. This year, he looks like he might actually do it. It's a blast to watch."
Watt currently has a half-sack lead over Cleveland's Myles Garrett for the AFC sack lead. And with Garrett suspended indefinitely, the next closest player to him in the conference is Chargers' defensive end Joey Bosa with 8.5.
Barring something unforeseen, Watt would be the first Steelers player -- and second overall -- to lead the conference in sacks since Kevin Greene did it with 14 in 1994.
As good as Greene was -- and he's in the Pro Football Hall of Fame -- Watt has a chance to be better.
"As the season goes on, you kind of get a feel for things. You like to think that some guys start to wear down and you kind of increase your availability and focus in meetings and practice," Watt told me. "You kind of want to keep getting better and pick up on the little things while other guys are starting to kind of start looking forward to the offseason.
"But you have to have the opportunities, as well. It’s kind of a mix of both. I definitely feel that as the games go on and I get more film on myself and my opponents, especially in divisional play when you start playing guys a second time around, you get a good sense of where you’re at and where other guys are at. You get a pass rush plan and get into a groove."
Watt is most certainly in a groove right now. Another sack on Sunday against the Bengals would give him at least half a sack in eight consecutive games, matching Woodley's streak to end the 2009 season.
If he can get to that mark, the next ones up would be James Harrison's single-season record of 16 set in 2008 when he was NFL Defensive Player or the Year, and the team record for an outside linebacker duo of of 27.5 set by Harrison and Woodley that season.
Those also are in reach.
"My aim is double digits," said Dupree, who currently has six sacks. "I’ve got to get to double digits. T.J. is already there. If T.J. can get 15 or so and I can get 11 or 12, we can make it happen.
"Those guys did a great job and played the run well. We’re trying to follow those guys and do what it takes."