The Chargers are 8-4 after Sunday's home win over Las Vegas.

Here are five takeaways from Chargers Head Coach Jim Harbaugh's Monday press conference:

1. Justin Herbert injury update

Chargers quarterback Justin Herbert has undergone surgery for a broken bone in his left hand.

The team released the following statement on Monday afternoon:

Chargers QB Justin Herbert underwent successful surgery today in Los Angeles to stabilize a fracture in his left hand.

Herbert's return to play is considered day-to-day, and his status for next Monday's game against Philadelphia will be determined later in the week.

Herbert was injured in the first quarter of the Bolts eventual 31-14 win over the Raiders.

Trey Lance led the Chargers next offensive series but Herbert returned to the game a few minutes into the second quarter and promptly threw a 10-yard pass to Keenan Allen to move the chains on third down.

"They just put a hard cast on it, put a glove around it. I think that was basically it," Herbert said postgame about returning to action.

Herbert stayed in for the rest of the game but he did not line up under center, instead staying in shotgun and pistol formations to avoid any snaps near the line of scrimmage.

Both Harbaugh and Herbert said Sunday that it's unclear if the quarterback will miss any time going forward. The Chargers next game is a Week 14 primetime date with the Philadelphia Eagles on Monday Night Football.

Herbert said both he and the Chargers medical staff are hopeful that he won't have to miss any games.

"I'm treating it as if I'm playing on Monday," Herbert said. "I think they were very hopeful for that. I think that's something that we'll see [Monday] and we'll get a feel for. I think they were very hopeful so that's always a good thing."

Harbaugh said: "We'll see where the week takes us."

The Chargers Head Coach later added: "He's as tough as they come. Taped it up, glove and played a great game."

With five games left, the Chargers sit at 8-4 and occupy the No. 5 seed in the AFC playoff picture.

2. Harbaugh pleased with Lance

As mentioned above, Lance was thrust into action for 10 total snaps Sunday against the Raiders, with eight coming when Herbert was out in the first half.

He took over late in the first quarter when the Bolts began at their own 7-yard line, completing his only pass attempt to wide receiver Tre' Harris for a nine-yard gain on his second play.

Harbaugh on Monday was asked about how Lance fared in Week 13.

"Calm, cool, collected. Came in and held down the fort. Really did a good job coming off of our own goal line," Harbaugh said. "I thought he did really good moving us down the field."

Although the Bolts mostly ran the ball with Lance at quarterback, he helped the Bolts get to midfield before Herbert returned to the game.

"Then all of the sudden it was third-and-5 and Justin just ran in," Harbaugh said. "Converted on a throw to Keenan [Allen] on the boundary and really never looked back."

Harbaugh said Monday that he wants to get Lance more reps this week in practice, particularly in goal line scenarios, in case Herbert potentially plays and is limited there again Monday night.

"All possibilities. We'll be better prepared for those situations," Harbaugh said. "Looking back on it, I don't think we've gotten enough reps with Trey in those situations. But that will be a point of emphasis this week.

"Justin is a quarterback who takes all the reps, he's a machine like that," Harbaugh added. "We'll make sure Trey is getting more of those goal line reps, under center. I need to do a better job of that."

3. All options under center

One reason Harbaugh wants Lance to get more reps is that the Chargers were unable to take advantage of a situation Sunday against the Raiders.

On Herbert's first full drive back in the game — which came after an interception from Tony Jefferson — the offense faced fourth-and-1 at the Las Vegas 18-yard line.

But with Herbert unable to line up under center, he was in shotgun as Kimani Vidal was stopped for no gain and a turnover on downs.

Harbaugh noted Monday that he would have liked Lance in the game or to use Tyler Conklin on a surprise sneak, which the Bolts did back in Week 1 against the Chiefs in Brazil.

"In hindsight, we would have a different play called there either using Trey under center or we could have gone with Conk," Harbaugh said. "We would have liked to have that back. Guys overcame it but we could have gone with other options."

"Right after we were like, 'Ahhh.' Could have, should have," Harbaugh added.

Harbaugh, speaking in general terms, said Monday that they Chargers were able to get to most of their playbook despite not being able to go under center.

"We improvised and adjusted. Many of the under center plays you could do in pistol," Harbaugh said. "There's certain plays it takes you out of, but there's other plays you can take from the pistol or the gun."

"We'll just see where the week takes us and what we can do … but you can still do them," Harbaugh added.

4. An update on Omarion Hampton

Harbaugh was also asked about the status of rookie running back Omarion Hampton, who returned to practice last week but was not activated for Sunday's game.

"We opened his window and we certainly wouldn't have done that — his 21-day window — if he wasn't close. Again, feel like he's been on track and let the week play out," Harbaugh said.

Hampton has been on Injured Reserve since suffering an ankle injury in Week 5. He said last week that he was excited to get back on the field at some point and help the Bolts with a playoff push.

"It feels good, feels great just to be back out with the guys. Couldn't ask for nothing better," Hampton said Thursday.

He later added: "I don't know a percentage, but I feel super good. I'm getting back to where I'm at. Getting more comfortable with it, so I feel really good where I'm at."

Hampton had been one of the Chargers most productive offensive players before his injury, tallying 86 total touches for 450 yards and two touchdowns.

5. Praise for the physicality

Sunday's win over the Raiders was a Harbaugh-type victory through and through, meaning the Bolts dominated up front, especially in the trenches with the run game.

The Chargers ran for 192 yards, their second-highest total of the season, while allowing a season-low 31 rushing yards to the Raiders. The difference of plus-161 yards was the Chargers second-best mark of the season only behind the Vikings win.

And you can bet Harbaugh loved how the Bolts responded after a down day in the trenches in Week 11.

"There was definitely a point of emphasis on it. All things paid dividends and were all pieces of the puzzle schematically," Harbaugh said. "There was a lot of variation, we probably ran 30 different types of runs during the game so that was really good."

Harbaugh singled out numerous position groups for their efforts, beginning with the offensive line of Jamaree Salyer, Zion Johnson, Bradley Bozeman, Mekhi Becton and Trey Pipkins III.

"Just the play and physicality of the offensive line, each guy across the front graded out over 90 percent. Some guys had their best games … just played really good," Harbaugh said,

He later added: "Just the play, the patience, the pride, the commitment to be better, that was a huge factor."

Vidal was critical, too, rushing for a career-best 126 yards on 25 attempts to best his previous best by two yards. Both Vidal and Jaret Patterson ran for scores, with the later rushing for 54 yards on 11 carries.

"Some stellar plays by Kimani Vidal," Harbaugh said. "And J-Pat ... great to see his first touchdown [with the Chargers] and the yards after contact he created."

Harbaugh also credited the Chargers pass catchers with hanging tough against a division-rival defense. While it was a relatively quiet day on the stat sheet, Ladd McConkey and Quentin Johnston found the end zone and Keenan Allen came up clutch on third downs.

"You talk about tough, physical play, it was anybody who had the ball in their hands during the game was able to not turn it over," Harbaugh said. "There were hard hits and contested catches by the receivers."