The Detroit Lions have lost their top running back for the foreseeable future.?Ameer Abdullah is heading to injured reserve after injuring his left foot during the second quarter of Sundays 16-15 loss to the Tennessee Titans.Lions coach Jim Caldwell said Wednesday that Abdullah underwent foot surgery, but he wouldnt go into details on the procedure. When asked whether Abdullah could return this season, Caldwell said, Well see.It is possible Abdullah could return later this season, as each NFL team can bring one player back off injured reserve.Abdullah injured the foot on a 24-yard run in which he broke multiple tackles. At the end of the run, he hobbled off the field and went almost directly into the teams locker room. He did not return.Initial X-rays on the foot showed no broken bones, a source said, but Abdullah went to Charlotte on Tuesday for a second opinion with specialist Dr. Robert Anderson. On Wednesday, the Lions placed him on injured reserve.Abdullah was Detroits No. 1 running back, gaining 101 yards on 18 carries this season. He also caught 5 passes for 57 yards and 1 touchdown.Guys have got to step up and play, Caldwell said. Somebody has got to take a few more carries than they would have ordinarily, and obviously I think we have a number of guys we can do that for us.With Abdullah out, Theo Riddick becomes Detroits top running back, with rookie Dwayne Washington and second-year pro Zach Zenner also having roles. The Lions worked out one of their former running backs, Joique Bell, on Tuesday, according to ESPN Insider Adam Caplan, but Bell has not signed with the club.Detroit signed wide receiver Aaron Dobson to take Abdullahs place on the roster. The Lions also signed linebacker Zaviar Gooden and running back George Winn to the practice squad and released guard Chase Farris and wide receiver Isaac Fruechte. Linebacker and running back are two positions of need right now for the Lions due to injuries.The Lions are dealing with a lot of injuries. Among the players missing from Wednesdays practice: Defensive linemen Ezekiel Ansah (ankle), Tyrunn Walker and Wallace Gilberry; linebackers DeAndre Levy (quad), Kyle Van Noy (calf) and Antwione Williams (thigh), tight end Eric Ebron and starting right tackle Riley Reiff. Authentic Custom Blues Jersey . LOUIS -- Theres no telling how these wacky World Series games will end. Custom Blues Jersey China . After a lengthy wait, persistent rain finally forced the postponement of the Nationals game against the Miami Marlins on Saturday night. 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EVANSTON, Ill. -- It looks as if No. 20 Nebraskas return to the Top 25 wont be a one-week affair.Tommy Armstrong Jr. threw for 246 yards and ran for a career-high 132 yards to lead the Cornhuskers to a 24 -13 victory over Northwestern on Saturday night in the Big Ten opener for both teams.Nebraska (4-0) remained unbeaten coming off a tight win over Oregon that vaulted the `Huskers into The Associated Press poll for the first time since December 2014.They lost two fumbles near the Northwestern goal line in the first half, but scored two touchdowns in the third quarter to stretch their lead from three to 11.We got two touchdowns early in the game, but theres no points on the board, coach Mike Riley said. So how are you going to react to that? Im really pleased with our reaction.The Wildcats (1-3) matched their loss total from last year when they went 10-3.Armstrong went 18 of 29, hitting Alonzo Moore with a 59-yarder in the first half and throwing a 4-yard touchdown strike to Cethan Carter that made it 17-7 early in the third after Aaron Williams intercepted Clayton Thorsons pass in the end zone.Terrell Newby ran for 69 yards and a touchdown . Moore had 72 yards receiving, and Nebraska finished with 556 yards in all.Thorson threw for 249 yards and had a 42-yard touchdown run. But he also threw two interceptions and was sacked four times, bringing his Big Ten-leading total to 15.Austin Carr had another big game for Northwestern with 109 yards receiving and a touchdown, giving him at least one scoring catch in three straight games. But a team that seemed to be getting on track with last weeks win over Duke after opening with losses to Western Michigan and Illinois State came up short against the resurgent Cornhuskers.These guys better figure it out pretty quick, coach Pat Fitzgerald said. They better walk out of the locker room. They better hug whoever they love. Theyd better go to bed and theyd better wake up and theyve got to get ready to get their rear ends coached off this week because thats whats gonna happen. Im not gonna sit here and Im not gonna take it and Im not gonna accept it. Theyd better buckle it up. Theyd better start hydrating right now because its not acceptable the way were playing.It starts and ends witth me so Im gonna fix it.ddddddddddddNebraska drove 80 yards for a touchdown after Williams picked off Thorson in the end zone on the opening drive of the second half, with Carters 4-yard TD catch making it 17-7.Northwestern answered with a 24-yard TD pass from Thorson to Carr, but Jack Mitchells extra-point attempt hit the left upright. The Cornhuskers then went 79 yards with Jordan Westerkamp running it in from the 10 to boost the lead to 24-13.THE TAKEAWAYNEBRASKA: The Cornhuskers ultimately took charge after those early turnovers and continue to roll along in their second season under Mike Riley. Its a big improvement over last year, when they had to rally to finish 6-7.NORTHWESTERN: Coach Pat Fitzgerald has been criticizing his team for not finishing drives. Hell probably have more to say about it, considering Northwestern racked up 388 yards. But the defense had its difficulties, too.HOLD ONNebraska might have put this one away in the first half if not for the turnovers.On the games opening possession, Newby fumbled as he tried to lung across the goal line at the end of a 49-yard run with two defenders in pursuit. The ball popped out as he contorted himself in mid-air along the sideline and bounced through the end zone.Nebraska had the ball on the 2 late in the second quarter when a spinning Devine Ozigbo lost a fumble.POLL IMPLICATIONS:Nebraska certainly appeared to strengthen its standing in the poll with this win, taking control after a shaky first half.KICKING COMPETITIONWhile Fitzgerald said Jack Mitchell will continue to handle kickoffs, field-goal duties and extra points are now up for grabs. Mitchell will be competing this week with Matt Micucci after he booted a 27-yard field goal wide right and hit the upright on a missed PAT.UP NEXTNEBRASKA: The Cornhuskers return home to face Illinois, which handed them one of their most disappointing losses a year ago. That was on a last-second touchdown and extra point in Champaign.NORTHWESTERN: Northwestern goes on the road for the first time when it visits Iowa -- a 14-7 winner at Rutgers after a surprising loss to North Dakota State. ' ' '