LAKE FOREST, Ill. -- The Chicago Bears released eight-time Pro Bowl defensive end Julius Peppers on Tuesday, one of several moves they made to reshape their struggling defence. The Bears also agreed to a five-year contract with former Oakland Raiders defensive end Lamarr Houston, a two-year contract with former Pittsburgh Steelers and New York Giants safety Ryan Mundy, and one-year deals with linebackers Jordan Senn and D.J. Williams. But the biggest move as they tried to shore up a defence that got shredded by injuries and ranked among the leagues worst last season involved Peppers. Given the way he struggled last season and the fact that his salary cap hit for next season was for more than $18 million, the Bears were expected to let him go or restructure his contract. "We appreciate Julius contributions to the Bears over the last four years," general manager Phil Emery said in a statement. "He was a leader on our defence starting every game since coming to Chicago. His accomplishments over his NFL career place him among the best defensive ends over the past 20 years. The Chicagoland community has benefited greatly from his quiet generosity. We wish him the best." Peppers is the second high-profile player to part ways with the Bears this off-season, joining record returner Devin Hester. Those moves come after they split with Brian Urlacher following the 2012 season. Peppers, who turned 34 in January, finished with just seven sacks, his lowest total in four seasons with Chicago and the fewest for him since he had a career-low 2 1/2 with Carolina in 2007. Three times last year he failed to register a tackle, and the Bears defence ranked among the worst in the NFL. But Peppers has been one of the best at his position during his career. In his 12 seasons with Carolina (2002-2009) and Chicago (2010-13), he ranks second in the NFL with 118 1/2 sacks. He has nine interceptions -- the most by a defensive lineman since 2002 -- and his 39 career forced fumbles are fifth most in the league during that time. On special teams, Peppers has 11 blocked kicks during his career. With the Bears, Peppers had 38 sacks along with three interceptions, nine forced fumbles and seven fumble recoveries. But he was inconsistent last season. At times, he showed that old burst. Too often, he was a nonfactor. The defence, overall, was a mess for the Bears last season because of injuries and poor execution. Williams, Lance Briggs, Charles Tillman, and Henry Melton missed big chunks of the season. Nickel back Kelvin Hayden and defensive tackle Nate Collins also suffered season-ending injuries. And the Bears couldnt stop the run or get to the quarterback. Chicago allowed a league-high 5.3 yards per carry, half a yard more than any other team, and tied Jacksonville with an NFL-worst with 31 sacks. Houston started all 16 games last season for Oakland and was one of the few playmakers on a 4-12 team. He led the Raiders with a career-high six sacks and got 16 in four seasons with them. Mundy made a career-high nine starts with the Giants last season after spending his first four with Pittsburgh. He had 70 tackles and a 91-yard interception return along with two pass breakups and a fumble recovery. He also had seven special teams stops. Senn has appeared in 83 games with seven starts over six seasons with Indianapolis (2008-09) and Carolina (2009-13). He was primarily a special-teams player last season. Williams appeared in six games and made four starts at middle linebacker last season after signing a one-year deal with Chicago. A ruptured pectoral muscle tendon cut short his season. Alex Iafallo Jersey . A last-minute leveler ensured the two-time defending champion remained nine points ahead of Roma, which drew 0-0 at bitter rival Lazio in the capital derby. 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General manager Jon Daniels said that Harrison was diagnosed with significant nerve irritation in his vertebrae. He will have an injection Friday in an attempt to alleviate the symptoms before considering other options, including surgery. Harrison, who made only two starts last season before two operations on a herniated disk in his lower back, came out in the second inning of his start Tuesday night at Houston. Daniels said the pitcher had a tingling sensation down his left leg, similar to what he experienced before having surgery last year. Perez has a partial tear of his ulnar collateral ligament in his left elbow. He could have an injection and rehab that could keep him out three months, or possibly have Tommy John surgery and miss a year. Right-hander Nick Tepesch was recalled from Triple-A Round Rock for his scheduled start Wednesday night against Houston. The Rangers also purchased the contracts of right-handers Scott Baker and Miles Mikolas from Round Rock, and designated right-hander Justin Germano for assignment. Tepesch was starting in place of Yu Darvish, who threw 126 pitches in his near no-hitter Friday night. The Japanese ace was given extended rest and is set to start Friday at home against Toronto. When Tepesch took the mound against the Astros, he became the 22nd different player to pitch for the Rangers this season and the 38th player overall. Both are the most in the majors. Texas has 13 players on the disabled list. Among the other hurt Rangers is left-handed starter Derek Holland, who is rehabbing from off-season left knee surgery after being tripped by his dog on the stairs in his home. Holland, who has been throwing live batting practice at the Rangeers complex in Arizona, is scheduled to be in Arlington this weekend for an evaluation and to throw for Rangers coaches.dddddddddddd He is still several weeks away from a possible return. Perez allowed six runs and 14 runners (nine hits, four walks and a hit batter) in 3 2-3 innings of an 8-3 loss to Boston on Saturday night, and reported discomfort in his elbow the following day. Since the end of his 26-inning scoreless streak over three games, Perez (4-3) has given up 19 runs over 13 1-3 innings in his past three games. Rangers team physician Dr. Keith Meister diagnosed the partial tear for Perez. Dr. James Andrews also reviewed the MRI and agreed that was the issue. Harrison was examined Wednesday by Dr. Drew Dossett, who did the two operations last year. Daniels said there was no evidence of disk herniation, but that the spondylolisthesis Harrison is now experiencing was considered a possible risk after the operations -- "If it didnt work as you would hope, this would be the outcome. Unfortunately, thats come to pass," the GM said. The options for Harrison included rehab and to live with the problem or have surgery that Daniels described as spinal fusion. Daniels said players have returned to the major leagues after have such fusions, but there are no guarantees. "Its more involved surgery and changes of coming back are lesser than some of the more traditional baseball surgeries," Daniels said. "If he did opt to have surgery, he would be out for the year with a chance to rehab and come in and compete in spring training." Infielder Donnie Murphy (neck strain) and left-hander Joe Saunders (left ankle) are scheduled to begin injury rehabilitation assignments with Round Rock on Thursday night. It will be the first rehab game for Murphy and the third for Saunders, who made only his first start of the season for the Rangers. ' ' '