IRVING, Texas -- The Dallas Cowboys decided one year with Monte Kiffin as defensive co-ordinator and Bill Callahan as play-caller was enough. Adidas Jakob Silfverberg Jersey . Kiffin was demoted Tuesday in favour of defensive line coach Rod Marinelli, and Scott Linehan was hired as the passing game co-ordinator who will call plays. The staff shuffling -- the second in as many years -- comes after the Cowboys gave up the most yards in franchise history and finished last in the NFL in total defence and had their worst offensive output in yardage since 2005. "If you look at staffs around this league and rosters all around this league, theres change from year to year," Garrett told The Associated Press. "And the teams that embrace the change are the ones that have the most success and again we feel like from a system standpoint, the systems on offence and the systems on defence, remain in place." Kiffin and Marinelli came to Dallas together last year after the Cowboys fired defensive co-ordinator Rob Ryan and decided to switch to a four-man front with three linebackers following nearly a decade in the 3-4 defence. Quarterback Tony Romo will have his third play-caller in as many seasons after Garrett had that role in 2012. There was even a change in the middle of this past season when Garrett reinserted himself by relaying the calls from Callahan to Romo. "Its not really a concern at all," Garrett said. "Weve had the same offensive system in place here for seven years. We feel like the transition will be really relatively smooth for everybody." Garrett is entering the final season of his contract and is coming off three consecutive 8-8 seasons that extended the clubs playoff drought to four straight years. Garrett said Callahan will remain on staff in 2014, also the final year of his contract. He will keep his titles of offensive co-ordinator and offensive line coach. "Just like you would with a player, guys are always in roles that tend to evolve and change," Garrett said. "If you have the right kind of guys on your team, they embrace those roles, understand the objective is to try to help our team first and foremost. Bill knows that." Linehan, the former St. Louis coach who was Detroits offensive co-ordinator the past five seasons, gave Garrett his first coaching job in the NFL in 2005 when he was offensive co-ordinator in Miami. Garrett was his quarterbacks coach that season. "He and I have a real comfort level with each other," Garrett said. "Philosophically, were on the same page. He has a comfort level with our system of football. The other thing hell bring is some new blood and some freshness to it." The Lions finished sixth or higher each of the past three years in total offence, while the Cowboys slipped to 16th, their lowest since 2002. While improving dramatically in takeaways on defence under Kiffin, the Cowboys gave up the first two 600-yard games in franchise history and surrendered 40 first downs for the first time in league history. Their 6,645 yards allowed were almost 1,000 more than the previous club record from 2012. Garrett said Kiffin, who will turn 74 next month, will serve more as a mentor who will "help coach coaches and coach players" after spearheading the transition to the 4-3 defence. Marinelli was Chicagos defensive co-ordinator for three years under Lovie Smith before Smith was fired in 2012, when the Bears led the league in interceptions (24) and takeaways (44) and were third in points allowed. "The success he had in Chicago as a co-ordinator speaks for itself," Garrett said. "To have him as a point person is exciting and to have Kiff in the overseeing role is again something we think is good for our team." The Cowboys now have three former head coaches on the staff in Callahan, Marinelli and Linehan, who was 11-25 in two-plus seasons as coach of the Rams. He was fired after an 0-4 start in 2008 and joined the Lions a year later when Jim Schwartz was hired as head coach. Schwartz was fired last month. Adidas Jean-Sebastien Giguere Jersey . Here are some of the best from Week One and some to watch in Week Two: TOP PERFORMERS Anthony Allen, RB, Saskatchewan (176 YDS, 2 TD, 30 touches vs. Hamilton) - Powerfully-built back burst onto the scene in his CFL debut, after a couple of years in the NFL, playing 21 games with the Baltimore Ravens. Adidas Ryan Kesler Jersey . Kamloops, B.C., the host city of this years Tim Hortons Brier, is where he won his first Canadian mens curling crown in 1996. http://www.cheapducksjerseys.com/?tag=adidas-nick-ritchie-jersey . Formula One boss Bernie Ecclestone dismissed Tuesdays massive anti-government protest in Manama as "a lot of kids having a go at the police." "I dont think its anything serious at all," Ecclestone was quoted as saying in The Guardian newspaper on Wednesday. BOCA RATON, Fla. - NHL general managers have agreed to make only a few rule-change recommendations to the competition committee after reaching a consensus to alter overtime and faceoffs. Pending approval from that committee and the board of governors, teams will switch ends at the start of overtime to make for longer line changes. As expected, there was not enough support to add any three-on-three or extra time to overtime. Adidas Lukas Dostal Jersey. Faceoffs could look much different, with GMs agreeing to try making centres who violate rules move 12-to-18 inches back instead of being kicked out of the circle. A second violation would remain a two-minute minor penalty. 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