ST. LOUIS -- St. Louis Rams starting linebacker Jo-Lonn Dunbar was suspended Wednesday for four games for violating the NFLs policy on performance-enhancing drugs. Dunbar, who was second on the team with a career-high 157 tackles last season, is able to participate in all team activities prior to the suspension, which begins with the season-opening game against Arizona. He will be able to practice and play in all exhibition contests prior to the opener. Dunbar did not take questions from reporters Wednesday but issued a 41-second statement. He appeared emotional as he walked away following the comments. "I just want to say that I did not take a performance enhancing drug," Dunbar said. "I mistakenly took something that prompted a failed drug test." The 27-year-old Dunbar also will miss games against Atlanta, Dallas and San Francisco. He eligible to return on Sept. 27. "I sincerely apologize to my teammates (and) the organization," he said. "I am deeply saddened by this. But I plan to serve my four-game suspension and get back to playing football as soon as possible." The 6-foot, 235-pound Dunbar is the second St. Louis player suspended by the league this season. Running back Isaiah Pead will miss the opening game for a violation of the substance abuse policy. Dunbar, who signed with the Rams on April 2, 2012, started all 16 games last season. He led the team in tackles for loss (23) and recorded 4.5 sacks. Veteran linebacker Will Witherspoon is in line to replace Dunbar. "You always feel bad any time a guy is going to miss a particular part of the season," Witherspoon said. "Were all going to support him." Witherspoon, an 11-year veteran, is ready to pick up the slack left by Dunbars suspension. "If Im asked to step in and start, then thats what Ill do," he said. "If not, Ill still be the veteran leader that Ive always wanted to be." St. Louis coach Jeff Fisher and general manager Les Snead were not available for comment. 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Cheap Air Max 95 Uk . -- Arizona pitcher Bronson Arroyo is expected to miss a week to 10 days because of a back injury. Cheap Air Max 95 Free Shipping . PETERSBURG, Fla.Manhattan, KS (SportsNetwork.com) - Jake Waters threw for 294 yards with four touchdowns and also ran for a score to lead No. 11 Kansas State to a 51-13 win over Kansas in the Sunflower Showdown. Tyler Lockett had 119 yards on nine receptions with two touchdowns, while Curry Sexton also caught nine passes for 141 yards and a score for the Wildcats (9-2, 7-1 Big 12). Lockett entered the game four receptions (217) and two touchdowns (26) shy of tying his father, Kevin, for the school record in each category. Charles Jones caught a touchdown pass from Waters and ran for another in the win. Michael Cummings went 16-for-27 for 139 yards with two touchdowns and two interceptions for the Jayhawks (3-9, 1-8), who have lost six straight meetings to their in-state rival. Kansas State, Baylor and TCU are tied atop the Big 12. The Wildcats wrap up their regular season next Saturday on the road in a pivotal matchup against Baylor. TCU, meanwhile, will host lowly Iowa State with both games deciding the Big 12 champion. Kansas State forced a quick punt of Kansas on the opening possession of the game, then DeMarcus Robinsons 35-yard run down to the Jayhawks 14 set up Waters 1-yard touchdown run three plays later. Dante Barnett got the ball right back for the hosts, intercepting Cummings at the KU 44. Waters wasted little time putting more points on the board as he converted a 44-yard strike to Lockett for a 14-0 lead. Randall Evans then picked off Cummings on Kansas ensuing touch, and Matthew McCrane capped the 12-play, 74-yard drive with a 41-yard field goal. Following a punt from each team, the JJayhawks finally got on the board with Cummings tossing a 27-yard TD to Nick Harwell at 8:42 in the second quarter.dddddddddddd The Wildcats blocked the extra point. Morgan Burns proceeded to return the kickoff 65 yards deep into Kansas territory. Four plays later, Jones rushed it in from 11 yards out for a 24-6 lead. Lockett hauled in passes of 17 and 11 yards on consecutive plays late in the half, then concluded the drive with a 6-yard touchdown reception with 47 seconds left. The Wildcats continued to pour it on in the third. Waters opened the quarter with a 20-yard pass to Sexton. Kansas States signal-caller capped the drive with a 13-yard TD pass to Jones. Kansas didnt give in, however, as it marched down the field for a score on Cummings 19-yard TD toss to Trent Smiley, who recorded the first touchdown of his career. Waters hit Sexton for a 37-yard touchdown strike later in the third for a 45-13 advantage. McCrane knocked down a 52-yard field goal early in the fourth, and Jack Cantele kicked a 39-yard field goal later to account for the final margin. Game Notes Kansas still leads the all-time series 64-43-5 ... Sexton now has 940 receiving yards for the season. If he records 60 more over the final two games, he and Lockett will become the first pair of Kansas State receivers to eclipse over 1,000 yards in the same season ... Under head coach Bill Snyder, the Wildcats are 19-4 against Kansas, including a flawless mark since his return to the sideline in 2009 ... Kansas State outgained its opponent 505-197. ' ' '