The San Francisco 49ers secondary has some question marks http://www.49ersauthorizedshops.com/authentic-george-kittle-jersey , and while we don’t have final answers, defensive coordinator Robert Saleh offered up some insight into the team’s approach.Strong safety Jaquiski Tartt has been dealing with a shoulder injury that limited him in practice last week. He aggravated the injury in the fourth quarter against the Lions, and is now missing practice in advance of the Chiefs game. He sat out Wednesday practice, and his status is uncertain for Sunday. Defensive coordinator Robert Saleh said Antone Exum, Tyvis Powell, and D.J. Reed are all getting work at strong safety. If Tartt cannot go on Sunday, I could see the team releasing linebacker Terence Garvin to promote Powell from the practice squad.Cornerback Ahkello Witherspoon is dealing with an ankle injury, and was listed as limited on Wednesday. Saleh would not commit to him being in the starting lineup on Sunday, but that could have as much to do with the ankle as with his struggles last week against Detroit. Richard Sherman hopes Witherspoon gets back into the starting lineup Earl Mitchell jersey , but how he responds in practice will impact things. Mason Crosby didn't have any excuses Sunday afternoon.The Green Bay Packers kicker, who had never missed three field goals in a game despite spending 12 seasons at Lambeau Field, missed four and an extra point in a 31-23 loss to the Detroit Lions."I don't usually get this much attention unless I've done something really good or really bad," Crosby told a crowd of reporters after the game. "This one is unfortunately really bad."He got a small amount of redemption by making a 41-yard field goal with 2 seconds left, but his onside kick bounced directly to Detroit's Marvin Jones."This hurts a bunch," he said. "I left a bunch of points on the field for this team, and I'm disappointed. This was something I've never been a part of before and I hope to never be a part of it again."To make things even stranger, the game was played indoors at Ford Field, a kicker's paradise."This is obviously uncharted territory Authentic K'Waun Williams jersey ," he said. "It's not good that I was inside and felt great, and then this happened."In his 181st NFL game, he was wide left on a 41-yarder late in the first quarter; hit the right upright from 42 yards early in the second quarter; and missed wide right on a 38-yard attempt with 3:38 left in the first half.In the second half, he missed a 56-yarder and an extra point.None of that was enough to worry his most important teammate."Mason and I have played together for a long time, and I strongly believe he's one of the greatest kickers of all time," Aaron Rodgers said. "He and Robbie Gould have mastered kicking in the elements. He had a bad day today, but we still believe in him 100 percent."Crosby is working with a rookie long snapper in Hunter Bradley and a rookie holder in JK Scott, but they didn't appear to be at fault on any of the kicks. The 34-year-old kicker came into the game having made 10 of 11 field goals this season, with the only miss coming outdoors from 52 yards."I have to look at this Youth Joe Staley jersey , look at every facet of it, and then flush it," he said. "It was one of those days where it just wasn't there, but I've never had a day like that before."After the terrible first half, Crosby had to wait for his next opportunity. The Packers scored a touchdown on their first drive of the second half, but successfully went for 2 to make it 24-8.The Packers had their next chance to kick a field goal late in the third quarter when they faced fourth-and-4 from the Lions 30. Crosby jogged onto the field, but the Packers decided to go for it. Rodgers scrambled for the first down, setting up Green Bay's second touchdown.If Crosby had made the three medium-range field goals in the first half, the Packers could have been within 24-23 instead of trailing 24-14. The missed kicks meant Matthew Stafford's touchdown pass early in the fourth quarter gave the Lions a commanding 31-14 lead."We're going to take a long look at what happened 49ers Arik Armstead Jersey ," Packers coach Mike McCarthy said. "We're going to be better next Monday against San Francisco."Rodgers answered with his third touchdown pass of the half to make it 31-20, but Crosby's extra point hit the outside of the left upright and bounced harmlessly wide.Needing two scores to tie, the Packers elected for a 56-yard field goal attempt on fourth-and-15 with 3:20 to play. Crosby's low kick slid to the right for his fifth miss of the day.He finally made his last attempt, ending the day with a little hope."I obviously needed to hit that one," he said. "We'll take that and move forward with it."