Joey Bosa will be a challenge to contain. (Michael Ainsworth/Associated Press)

While the Redskins’ playoff chances are effectively nonexistent, there is still the slightest chance they can sneak in. But to do that, they would need to win out, starting with this week’s trip to Los Angeles to take on the Chargers, who have won their past three games. Here’s a look at some of the key matchups:

Chargers DE Joey Bosa vs. Redskins RT Morgan Moses

Bosa has quickly developed into one of the best pass rushers in the NFL. He’s fifth in the league in sacks with 11.5, eclipsing his total for last year with four games still to go. He has a good burst off the snap to force the offensive tackle to open his hips before converting to power to bulldoze over him. Bosa plays with fantastic leverage and has great hand usage, giving him multiple ways to beat a tackle. It’s unclear who will be the Redskins’ starting left and right tackles: Both Moses and Trent Williams are dealing with injuries that have held them out of practice. Bosa will switch sides regularly, but he will likely give Moses more difficulties than Williams. At 6-foot-6, Moses has trouble at times dealing with opponents who play with exceptional leverage, so expect Bosa to give him a tough test if he does play.

Chargers WR Keenan Allen vs. Redskins CB Josh Norman

The Redskins have had their cornerbacks almost exclusively play sides this year, with Norman on the left and Bashaud Breeland on the right. If they stick with that plan, the Chargers can dictate against whom Allen matches up. But if there were a game to break from that plan and have Norman follow a receiver, it might be this one. Allen is as hot as any receiver in the NFL. He’s fifth in the league in receiving yards and has 33 catches for 436 yards and four touchdowns over his past three games — that’s a staggering 145.3 yards per game. He’s a terrific route-runner who uses a full array of moves to set up routes and keep cornerbacks off balance. Whoever is tasked with covering him will be in for a long day.

Chargers CB Casey Hayward vs. Redskins WR Josh Doctson

Washington must be encouraged by the way Doctson has developed this season after a rocky start. But this week, he’ll face his toughest test: Hayward is one of the best cornerbacks in the league. He led the NFL with seven interceptions last season and has four in 2017.

Read more on the Redskins:

Trent Williams is at the line between courageous and foolish — and still playing

‘Tis the season for anonymously sourced reports about how the Redskins don’t like each other

No playoffs? No job security? Redskins’ Zach Brown plays on, despite injury.

His season marred by injuries, Redskins’ Jordan Reed hopes for brighter days ahead