SANTA CLARA, Calif. -- On Monday, NFL agent Drew Rosenhaus appeared at the San Francisco 49ers second training camp practice. Afterward, he and client NaVorro Bowman, the teams star linebacker, were seen walking upstairs to the offices that rise above the practice fields.By Wednesday night, Bowman and the 49ers had agreed to a four-year contract extension, which will be added to the three years Bowman had remaining on his previous contract. Sources told ESPN NFL Insider Adam Schefter that the four-year extension is worth $44 million, including $20 million guaranteed.Bowmans new-look pact takes him through the 2022 season and solidifies his standing as a franchise centerpiece for coach Chip Kelly and general manager Trent Baalke.At 28, Bowman is coming off a bounce-back 2015 season in which he overcame a devastating knee injury, which cost him the entire 2014 season, and earned his fourth first-team All-Pro honors. By his own admission, Bowman wasnt at full strength in 2015, but he managed to lead the NFL in tackles, with 154 to go with 2.5 sacks and a forced fumble.Entering this season, Bowman made it clear that he feels stronger and ready to prove he has plenty of good football ahead of him.Im not too worried about the knee, Bowman said. The knee feels great, but Im still staying on it so that anything that comes up that would hold me back wont come up.Im just excited to have another year to go out and improve on the year that I had last year, just to prove the doubters wrong and get back to the level that I was at and get the respect that I deserve.Given the three years left on Bowmans contract, this deal is a rarity, but the 49ers have been adamant about wanting to spend some of their nearly $50 million in cap space to retain some of their key pieces. Bowman obviously fits that description.In 2012, the 49ers signed Bowman to a contract extension that was set to take him through the 2018 season. He had three years and $23.55 million remaining on that deal.Although the 49ers are only three practices into this years camp, defensive coordinator Jim ONeil said he can already see a little extra bounce in Bowmans step. That Bowman serves as one of the primary leaders on a young team only makes his continued presence more valuable.I thought last year, towards the end of the year, he was kind of back to what he was pre-injury, ONeil said. But NaVorros been great. I think hes really started to step into that leadership role, and theres a lot of guys in the NFL who are lead-by-example guys. I think NaVorro has kind of taken that next step, and hes a follow-me-or-else guy, which are the kind of leaders you need to have to have a great unit in this league.With a new deal in place, the 49ers could have their leader around for seven more seasons. 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The Flyers had won seven of eight before dropping their last two outings on consecutive days over the weekend. Philadelphia was handed a 6-3 loss by the visiting Tampa Bay Lightning on Saturday afternoon before dropping a 4-1 decision to the Rangers the following night in New York City. ATLANTA -- Atlanta Falcons defensive end Brooks Reed, who committed a crucial fourth-quarter penalty for 12 men on the field when he failed to hustle off, owned up to a mistake that could have been costly in the Falcons 33-32 victory over the Green Bay Packers?on Sunday.I opened up my Twitter and I just had to shut it down, Reed said of the criticism he received on social media afterward. I was getting killed.Reed admitted he should have moved faster to the sideline with 6 minutes, 46 seconds left in regulation and his team holding a 26-24 lead. Packers coach Mike McCarthy challenged there were too many men on the field and won as a result of Reeds lackadaisical effort. The end result was that QB?Aaron Rodgers led the Packers to a touchdown and converted the two-point conversion, giving Green Bay a 32-26 edge.I had a feeling because when I turned around, they had called a quick play, Reed said of the Packers. I was like, Oh God. Please. No. I should have been running off the field. Simple as that. No excuse. It doesnt matter how tired I am. Its a basic thing. Youre off the field when youre coming out. We knew [Rodgers] did some of that stuff when youre exchanging personnel. Hell quick-snap it to get those calls.Its a crappy feeling, mman, when you could have cost your team the game.dddddddddddd Thats one of the worst feelings that someone could have.Reed was thankful QB?Matt Ryan and the offense pulled it out. Ryan hit Mohamed Sanu with a game-winning, 11-yard touchdown pass with 36 seconds remaining.Hes just so cool under pressure, Reed said of Ryan. He just thrives with that. He steps his game up when pressure situations come on. And hes got the weapons to throw to.Falcons coach Dan Quinn was asked about his futile attempt to call timeout before the officials picked up on Reeds error.We thought we had an opportunity to sub, and it certainly went quicker than we thought, Quinn said. I ran down the sideline to call timeout, and certainly my quickness was not up to speed.Quinn was asked about Reeds quickness.Well, neither was his, Quinn joked.Reed said he sincerely regretted the mistake.Youre just playing your butt off, and then you get something called like that? Running off the field could have cost your team the game? God, man, he said. Unbelievably bad feeling in your stomach. I was like, Now Ive got to get a game-winning sack here. ' ' '