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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Edwin Encarnacion had a two-out, bases loaded two-RBI double in the third inning. Lee Westwood produced the perfect response to his World Cup disappointment as defending champion Rory McIlroy carded his worst ever round in the DP World Tour Championship.McIlroy has won the European Tours season-finale twice and never finished worse than 11th in seven appearances at Jumeirah Golf Estates, with a 72 in 2010 his worst score in 28 rounds.However, the world No. 2 could only manage an opening 75 on Thursday to lie joint 55th in the 60-man field, nine shots behind Ryder Cup teammate Westwood.It took McIlroy 14 holes to register his first birdie of the day and although he swiftly added another on the next, the four-time major winner double-bogeyed the 16th after needing two attempts -- the second minus his right shoe and sock -- to play from the edge of a water hazard.In contrast, Westwood carded seven birdies and just one bogey to match his opening 66 in the inaugural event in 2009, which he went on to win by six shots to become European No. 1 for the second time.Thats certainly in the top two or three performances in my career, Westwood said. Maybe even the best performance of my career, knowing that I needed to win to beat Rory in the Race to Dubai, and did that by six and pretty much dominated the field over the weekend.Today was as good as Ive played for quite some time. Ive found a couple of keys in different parts of my game and Ive been working on them hard and it all came together today.Westwood had been due to make his World Cup debut in Melbourne next week, but with Danny Willett pulling out to protect a back injury, Ryder Cup teammate Chris Wood took his place as the next highest English player in the world rankings at the end of July.Under tournament rules, Wood was also able to select his partner and opted for Andy Sullivaan, much to Westwoods disappointment.ddddddddddddIve been looking forward to it for a few months now, so its frustrating, said the 43-year-old, whose frustration was probably heightened by seeing Wood and Sullivan shoot 75 and 76 respectively.Im disappointed not to be playing. I can understand him picking a mate and hes picked a very good player. Its probably more to do with the rules than anything.I think the week before somebody is meant to go down there is a little late to say, no, youre not playing.I needed to be higher in the world rankings to pick my partner and if Im higher next year Woody probably shouldnt be expecting a pick!Westwoods former Ryder Cup partner Nicolas Colsaerts and Frances Julien Quesne shared second place on five under, with Sergio Garcia, Francesco Molinari and Joost Luiten a shot further back.Colsaerts carded five birdies in a flawless round but was disappointed not to go even lower, adding: When you play that well you want to squeeze every shot you can out of it, but Im confident I can keep rolling like this.This is probably the one course out of the three in the Final Series that suits my game the best. Theres corners I can take on. I can use my length as a big advantage to come in with shorter irons into greens, especially the way the greens are designed.This is the one that I had my eyes on and I know that if I bring the game that Ive been displaying all year out here on this course, it should be a decent recipe.Race to Dubai leader Henrik Stenson, who has a lead of 299,675 points over Willett, managed just one birdie in an opening 72, with Willett and Alex Noren both one shot better off. ' ' '