PITTSBURGH — Aaron Donald is losing his edge. Kind of.

The Los Angeles Rams defensive tackle spent his team’s bye week back home in Pittsburgh working out in the facility at the University of Pittsburgh that bears his name . It was cold. Well, cold to a guy who’s spent the last few years soaking up the Southern California sunshine while becoming the NFL’s most disruptive force.

“It was a little chilly,” Donald said with a laugh. “I said: ‘LA is changing me! I’m getting a little soft!'”

Not exactly.

The two-time NFL Defensive Player of the Year remains as dangerous as ever heading into today’s homecoming at Heinz Field (4:25 p.m., FOX) when the Rams (5-3) visit the Steelers (4-4). Following a slow start, Donald has sacks in three straight games, looking very much at the height of his considerable powers.

“He’s just a game wrecker,” Steelers outside linebacker T.J. Watt said. “It doesn’t matter what aspect of the game it is, he really has no weakness and that’s what makes him the best.”

And a potential matchup nightmare for Pittsburgh. The Steelers have ripped off three consecutive victories after opening 1-4, relying heavily on the defense to create turnovers while the offense searches for an identity under quarterback Mason Rudolph. Rudolph has been a solid game manager if not exactly a difference maker, thanks in part to an offensive line that’s allowed a league-low eight sacks.

RED-ZONE WOES

No team was better at turning red-zone possessions into touchdowns last year than the Steelers. This year, not so much. Pittsburgh is 28th in the league in red-zone touchdown percentage and converted just one of four red-zone opportunities against Indianapolis last week, one of the reasons the Steelers had to white knuckle their way to a 26-24 victory . Asked why his team is struggling to score, Tomlin laughed.

“What do you think? We’re still writing our story, but you can come to whatever conclusion you want about our lack of productivity in that area,” Tomlin said. “I’m not going to take a whole lot of time outlining that.”

He shouldn’t have to. Roethlisberger is out for the year and wide receiver Antonio Brown is out of football after blowing through three teams in six months.

TERRIFIC TWOSOME

Donald doesn’t have the market cornered on getting to the quarterback. The Steelers are fifth in the league in sacks (29), led by Watt and fellow outside linebacker Bud Dupree, who have combined for 13¢ sacks through eight games, making it difficult for opponents to pick which one to throw an extra body at on a given play.

“That’s the awesome thing about having a guy on the other side who is so effective because they can’t just chip one of us because the other side is going to be free,” Watt said. “So hopefully we can keep drawing the attention that we’re drawing and keep producing like we are.”