NORMAN, Okla. -- Oklahoma defensive lineman Charles Walker has chosen to leave the program and enter the NFL draft.Defensive coordinator Mike Stoops made the announcement after Tuesdays practice.Walker, a second-team All-Big 12 pick by the coaches last season, missed the national semifinal last season against Clemson with a concussion. This season, Walker played in only four games, also because of a concussion. As of Monday, his playing status was uncertain, and he was to meet with trainers.Walker is the second defensive lineman the Sooners lost for good this week. Coach Bob Stoops announced Monday that Matt Dimon and the program have agreed to part ways. Dimon has suffered from a strained Achilles and hasnt played since the Ohio State game in September. Eddie Murray Jersey . Capitals head coach Adam Oates said Ovechkin was injured in the first period against the Vancouver Canucks on Monday and clarified it was not a head injury. Cal Ripken Jersey . -- Former San Diego Chargers safety Paul Oliver was found dead at his Atlanta-area home Tuesday night, and a medical examiner said Wednesday that the ex-player committed suicide. http://www.theoriolesteamshop.com/Orioles-Mark-Trumbo-Kids-Jersey/ . On Tuesday, Ottawa placed forward Cory Conacher and defenceman Joe Corvo on waivers as trade rumours swirl around the Senators. Andrew Cashner Jersey . Irving scored 23 points, Tristan Thompson had 20 points and 10 rebounds and the Cavaliers beat the Denver Nuggets 117-109 on Friday night. Jonathan Schoop Jersey . -- Tony Stewart is 20 pounds lighter and has a titanium rod in his surgically repaired right leg. SAN FRANCISCO -- The San Francisco Giants landed the top-tier closer they have been seeking for months, agreeing to a $62 million, four-year contract with right-hander Mark Melancon on Monday.Its the richest contract ever for a closer, topping Jonathan Papelbons $50 million, four-year deal with the Phillies from 2012-15 and Mariano Riveras $15 million annual value total in 2011-12 by the Yankees.Really excited to have Mark, manager Bruce Bochy said in a text message. Got to know him on a trip to Taiwan in 2011. Fills an important need for us. Great to get one of the premier closers in the game.Pending a physical, the pitcher receives a $20 million signing bonus, $8 million of which is deferred, then salaries of $4 million for 2017, $10 million in 18 and $14 million in each of the `19 and 2020 seasons. He has a full no-trade clause and the chance to opt out after the first two years.Melancon has saved at least 30 games in each of the past three seasons, recording a majors-best 51 in 2015. He went 47 for 51 in save opportunities in 75 relief appearances last season with Pittsburgh and Washington, tied for second-most saves in baseball with Baltimores Zach Britton and Kenley Jansen of the Dodgers behind the Mets Jeurys Familia with 51.After San Francisco tried to acquire Aroldis Chapman at the trade deadline and missed out to the Cubs, finding a reliable ninth-inning option became top of the to-do list for the offseason. Melancon was dealt to the Nationals from the Pirates.Adding a premier closer was our main priority this offseason, general manager Bobby Evans said. Mark solidifies the back end of our bullpen and fills a critical role.dddddddddddd. He brings talent, leadership and experience to our pitching staff.Because the 31-year-old Melancon was traded during the season, the Giants dont have to give up their first pick in Junes amateur draft as compensation.The Giants blew 32 saves this past season, nine in September -- one fewer than Melancon had over the past three years -- and the last in a 6-5 Game 4 loss to the Cubs that ended San Franciscos season. Chicago scored four runs in the ninth as Bochy tried five relievers in the inning.Santiago Casilla and Sergio Romo, two reliable relievers in even-year championships of 2010, `12 and `14, were both inconsistent.Last offseason, the Giants made a splash by adding to their starting rotation, signing Johnny Cueto to a $130 million, six-year contract and Jeff Samardzija for $90 million over five years.Nationals GM Mike Rizzo, speaking at baseballs winter meetings in Oxon Hill, Maryland, said Washington made an offer.We gave him an offer that we felt was market value and what we were comfortable giving him. Youre talking about one of the elite closers in the game and a great teammate, Rizzo said. Conducted himself perfectly as a Washington National. At the end of the day, the Giants offered him more, and he took the deal. Thats what free agencys all about. ...Theyve got themselves a great citizen and a great pitcher.---AP Baseball Writer Ronald Blum and AP Sports Writer Howard Fendrich in Oxon Hill, Maryland, contributed to this report. ' ' '