SANTA CLARA Miles Boykin Jersey , Calif. (AP) — they’re not even sure which holes to fill first.Three of San Francisco’s five starting offensive linemen — left tackle Joe Staley, center Weston Richburg and right tackle Mike McGlinchey — suffered knee injuries during Sunday’s loss to the Los Angeles Chargers that leave them questionable for this weekend’s game against the Arizona Cardinals.The 49ers are also dealing with injuries to their receivers and defensive backfield, and that’s making it difficult for coach Kyle Shanahan and the front office to figure out how to adjust the roster.For example, with quarterback Jimmy Garoppolo having been lost in Week 3 to a torn ACL, the 49ers would like to sign a free agent to provide insurance behind current starter C.J. Beathard and backup Nick Mullens.But with the availability of so many players unknown right now, Shanahan said the team has to stay flexible to see which positions might need reinforcement.“We’ve got a bunch of situations we’re looking into,” Shanahan said. “Right now, I’d love to answer the quarterback situation because you do want a third one in the building. But there a lot of things that are taking precedent right now.”Rookie receiver Dante Pettis http://www.packerscheapshoponline.com/cheap-authentic-darnell-savage-jr.-jersey , San Francisco’s main punt returner, injured his left knee against the Chargers and has been ruled out for this Sunday. Fellow receiver Marquise Goodwin, who starts opposite Pierre Garcon, is questionable with quadriceps and hamstring issues.A bit of good news: Strong safety Jaquiski Tartt, who has missed the past two games with a shoulder injury, is expected back against Arizona. But the status of free safety Adrian Colbert, hampered by a hip contusion, remains unknown.The 49ers also are missing their leader in the secondary, veteran cornerback Richard Sherman http://www.ravensauthorizedshops.com/authentic-justice-hill-jersey , who is likely to miss his second game in a row with a strained left calf.But the most pressing concern has to be the offensive line.The 34-year-old Staley, a five-time Pro Bowler, left Sunday’s game in the second quarter and didn’t return. He was replaced by Garry Gilliam.Richburg and McGlinchey both returned to the game, eventually, after getting hurt, but they’re still hobbled.Keeping Beathard healthy is a priority considering the 49ers have already lost Garoppolo. In his first start of the season Sunday, Beathard generally completed 23 of 37 passes for 298 yards, two touchdowns and two interceptions.But the second-year quarterback took several big hits from the Chargers’ defense, some of them plays on which he could have unloaded the ball or slid in the open field to avoid contact.“We want him to stay healthy and we’re gonna do everything we can to coach him to do that Ben Powers Jersey ,” Shanahan said. “I know C.J.’s gonna work at it too. There’s times he’s gotta get down and give up on a play.“But it’s gonna be hard for me to go too hard on him when it’s third-and-5 and the game’s on the line. Most quarterbacks are going to attempt (to gain yards) in that situation.” The National Football League is a sports organization unlike any other located in North America. Those running the NFL have mastered the art of turning a competition that runs for roughly five months into a product that is worthy of yearlong coverage. Pro football diehards who live and die on the NFL can get their fill 12 months out of the year thanks to events such as the NFL Scouting Combine, pro day workouts, the NFL Draft, and then all of the training sessions, practices, preseason activities and roster shake-ups that lead up to meaningful games that kick off in September.Business is better than ever for the NFL these days. The league brings in record amounts of revenue with every year, Sunday Night Football dominates in the ratings on a weekly basis, and the NFL is looking to relocate teams to major cities. Los Angels could, if rumors are accurate http://www.ravensauthorizedshops.com/authentic-iman-marshall-jersey , soon be the home of both the San Diego Chargers and the Oakland Raiders if those two franchises can agree on a long-term partnership. The St. Louis Rams could also potentially move out west if team owner Sam Kroenke has his way. We now know that the Buffalo Bills will be staying put rather than moving to Toronto, but there continue to be whispers that the Jacksonville Jaguars could relocate overseas to London at some point over the next decade or so.That final sentence from the previous paragraph is just one example of how the NFL has insulted the intelligence of fans over the years. One would also have to include the ridiculous “Deflate-Gate” case that grabbed headlines for nearly eight months and that made, of all people, New England Patriots quarterback Tom Brady the good guy in a spat that included NFL Commissioner Roger Goodell. Last but certainly not least are the NFL rules that insult fans, the games and the athletes who take the field on Sundays, regulations that need to be explained by “experts” because they make so little sense to casual viewers.