PITTSBURGH -- Replacing Cam Heyward the football player may be the easy part for the Pittsburgh Steelers. Finding someone to do all the things their injured defensive end -- out for the season with a torn pectoral muscle -- does on the field that dont show up on tape will be considerably more difficult.It definitely hurts us, linebacker Ryan Shazier said. It punches you in the heart because hes the heart of our defense.One who does more than simply shrug off blocks and wrap up running backs. Heyward is one of Pittsburghs four captains for reasons that go far beyond simple talent. He makes the line calls, offers in-game pointers and serves as the emotional fulcrum for the guys around him.Now hes gone after an MRI discovered the twinge he felt in last weeks loss to Dallas was actually his pectoral muscle shredding itself, leaving behind a defense thats failed to limit big plays during a four-game losing streak thats sent the Steelers (4-5) tumbling into a midseason crisis. While the winless Cleveland Browns (0-10) offer the promise of a temporary salve on Sunday, Pittsburgh understands it needs to find a way to get better quickly if it truly wants to turn things around.Its hard to lose a guy like your captain and stuff like that, quarterback Ben Roethlisberger said. But other guys have to step up. I mean, its that time of year.If the Steelers want to get it together, they dont really have much of a choice.Weve just all got to get better as a group, rookie nose tackle Javon Hargrave said. Thats our leader. Hes the oldest on the D-line. He knows more than us. Weve just got to grow up.Quickly. The defensive front faltered when a bum left hamstring forced Heyward out of the lineup for the first time in his six-year career last month. He could only watch in frustration as Miamis Jay Ajayi became the first player in 16 years to go over 200 yards rushing against Pittsburgh in a Week 6 loss and New Englands Garrett Blount bulled his way for 127 yards and a pair of touchdowns seven days later.Teams been running on us a lot lately, nose tackle Daniel McCullers said. Thats not Steeler defense.At least not the way Pittsburgh used to play it. Not so much anymore. The proof came in the final 2 minutes last week against Dallas, when Ezekiel Elliott sprinted to the end zone twice to rally the Cowboys to a victory that sent the Steelers to their fourth straight loss. And that was with Heyward in the huddle. Now theyve got to clean up the mistakes without him.Sometimes we get in the right spots and were not executing, Shazier said. Sometimes were in the right spots, getting moved out of the way and sometimes were not doing the right thing.Heywards absence puts more pressure on Stephon Tuitt, who defensive coordinator Keith Butler will move up and down the line in search of mismatches. Thats fine by Tuitt, who has shown flashes of dominance at times but will now be asked to do it on a more consistent basis. Hes developed a close friendship with Heyward during his three years in the league, in part because he knew at some point this moment would arrive.Its gonna be tough because we have a partnership, we have a chemistry, Tuitt said.One Tuitt will try to develop with Hargrave, McCullers and Ricardo Matthews. Tuitt is more reserved by nature and joked earlier in the year he doesnt pay attention to the game plan and instead simply does what Heyward tells him to do. Now Tuitt will find himself doing the yelling.For me to get this role now, its not under the circumstances I want them to be under but I almost get the veteran role back and teach my defensive linemen and lead by example.Heyward will still be around on the sideline and in meeting rooms. But not having his familiar No. 97 in the huddle will take some getting used to for a group thats grown accustomed to his steadying influence.Hes like a brother to us outside of football, McCullers said. We always spend time with each other, hang out. Its big (to lose him). Weve got to play hard for him.Game notes TE Ladarius Green (knee), WR Sammie Coates (finger), S Jordan Dangerfield (groin) and TE Xavier Grimble (quadriceps) were limited on Wednesday. ... C Maurkice Pouncey (finger) and WR Markus Wheaton (shoulder) did not practice.---For more NFL coverage: http://www.pro32.ap.org and http://www.twitter.com/AP-NFLGreen Bay Packers Jerseys . 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HOMESTEAD, Fla. -- NASCAR chairman Brian France staunchly defended Sunday the health of the sport, saying that it is in a good spot to replace Sprint as an entitlement sponsor amid television ratings and attendance declines.In his first general news conference with motorsports media since January, a feisty France also staunchly defended his commitment to diversity, a commitment that was challenged when he endorsed Donald Trump earlier this year.Nobody wants to hear my political views ... so I wont be talking about that, France said before the season-ending race at Homestead-Miami Speedway. But on diversity, nobody in this company has worked harder, done more and resourced it better than me.I founded [NASCARs] diversity council. I fought for every single thing that makes sense because thats my core belief: Diversity is very, very important. I talk about it frequently. And my efforts there should never be challenged no matter what my political view. Thats a ridiculous thing to do.With all but two of the Chase for the Sprint Cup race television ratings down at least 10 percent, the track public-operating companies reporting admission revenue down 9 percent after the Daytona 500 and potentially seven of NASCARs charters (its version of franchises) changing hands as teams still have trouble finding sponsorship, France said the sport is in a better position than those numbers indicate.We are still very pleased with our position in sports, France said. The audience isnt going away at all. Its sliding to different places, consuming in different wways.dddddddddddd ... Our digital consumption is off the charts.Multicar teams Richard Petty Motorsports, Roush Fenway Racing and Stewart-Haas Racing are among well-established teams that are still seeking significant sponsorship to field one of their cars in 2017 that they fielded in 2016.You have some teams that for whatever the reasons cant compete at such a high level and they have some problems, and thats throughout history, France said. Its not abnormal at all.The other hurdle for NASCAR this year has been finding a replacement for Sprint, which will leave this year after 13 seasons of sponsoring the sport. NASCAR has not announced a new sponsor. Industry insiders have indicated Monster Energy is the leading candidate. Monster Energy sports marketing director Mitch Covington said last week he would not respond to rumors.Its taken a little longer than I thought, France said. But its also a big agreement, and its an important agreement. Its not just dollars and cents. Its a fit for us. ... Im confident were going to end up in a very good spot.France also said that NASCAR will look at rewarding the regular-season champion and that discussions continue to bring additional manufacturers into the sport.Would I like to have everything perfect? Of course I would, France said. Thats sports and thats a competitive business, and the model is changing a little bit, too. ... Were pleased with the health of the sport. ' ' '