RICHMOND, Va. -- Redskins training camp has officially ended, but not before head coach Jay Gruden put his team through its longest session since arriving in Richmond on July 24.

"We accomplished what we wanted to," Gruden said about the past two-and-a-half weeks. "We've had some good days and we've had some sloppy days as most teams do this time of year. Overall, I think we've got a good look at a lot of guys and that's the intent of training camp – to get your system installed and then watch these guys progress, watch these guys play and just continue to add to our evaluation process. I think we've done a good job so far. Still a lot of time left for these guys to show what they can do and put some days together and try to fight to make this football team."

Redskins.com's Kyle Stackpole breaks down the key plays and highlights from Day 13 of training camp at the Bon Secours Washington Redskins Training Center on Sunday.

Offense:

-- After five interceptions Saturday, the offense got back on track during the final training camp session.

-- Case Keenum worked with the first team Sunday putting forth a strong performance. He hit multiple wide receivers during 7-on-7 drills, capping the red zone drive with a short touchdown to Chris Thompson. Later in practice, Keenum led the starters down the field against the first-team defense. The drive included a dump off to Thompson and a downfield strike to Brian Quick, as well as strong runs for Adrian Peterson and Derrius Guice. Tight end Jeremy Sprinkle then provided the exclamation point by catching a short touchdown to the delight of Keenum and the offensive linemen, who met him in the end zone to celebrate.

-- Colt McCoy began the session with the day's only interception but bounced back to make some quality throws. Immediately after the pick, McCoy found tight end Vernon Davis nestled in the middle of the defense for a solid gain. And towards the end of practice, McCoy and rookie wideout Terry McLaurin hooked up for a long score.

-- Following a trio of interceptions Saturday, Dwayne Haskins looked more comfortable Sunday morning. His session began with a well-placed deep ball to Josh Doctson that was broken up at the last second. He then completed three of his four attempts during 7-on-7s, hooking up with Doctson for a score over the middle. Fittingly, Haskins' training camp ended with a touchdown to one of his most popular targets: tight end Donald Parham.

-- A new quarterback joined the fold Sunday, with Jalan McClendon serving as the fourth-string signal caller. The team signed McClendon in response to the loss of Josh Woodrum, who tore his pectoral muscle in the preseason opener and was subsequently placed on Injured Reserve. Gruden said the former Baylor quarterback had a strong workout after practice Saturday, highlighting his mobility and arm strength.

"Still got to get him taught the offense here," Gruden said. "It's going to be a long process, but he's a good kid. He's got some talent."

-- The running backs ran with vengeance Sunday, especially during the team session where it moved the ball. Guice issued a nasty stiff arm during a red zone play that sent Montae Nicholson to the ground, and minutes later Adrian Peterson knocked over Josh Norman on his way into the end zone. The two-play sequence wowed those in attendance, exciting them about the potential of the duo heading into the season.

-- Trey Quinn (thumb) did not practice for the second straight day. Gruden said Quinn hurt his thumb during pregame warm-ups of the preseason opener and is questionable for Thursday's game against the Bengals but added that "he'll be OK."

"He's got the skillset you want at receiver: tough, physical, smart," Gruden said. "You've got to have those attributes to play slot because there's a lot of different looks you got – lot of different formations, nuances at that position that you have to handle mentally and physically and we feel like he can do that."

-- Gruden said the team is still working through who will start at left tackle in the absence of Pro Bowler Trent Williams. Geron Christian Sr. is working with the starters for now, with veteran Donald Penn backing him up. There's also Ereck Flowers, who began his career as a tackle but has been starting at left guard during the latter stages of training camp.

"Geron [Christian] is coming back from his injury like we all know, he's got a chance," Gruden said of position battle. "Obviously Donald [Penn] is a veteran guy who has been there and blocked a lot of guys in his career and then Ereck Flowers has played both sides as a right and left tackle in his career. So, we have some guys that can play [left tackle], we've just got to figure out which one's best for us."

Quick hits:

• Haven't mentioned Thompson much in these notes, but the pass-catching back looked explosive and shifty in Richmond. Similar to Jordan Reed, Thompson is dangerous when he's fully healthy. Fans in attendance saw that throughout training camp.
• Another camp standout: Terry McLaurin. The rookie wideout outran defensive backs throughout camp and punctuated his dominance Sunday with a leaping touchdown grab on a long pass from Colt McCoy. McLaurin seems primed to make immediate contributions in Washington.

Defense:

-- Safety Montae Nicholson snagged his first interception Sunday, stepping in front of the wide receiver and tipping the ball to himself before taking off the other way. He was also one of the most physical defensive backs throughout camp, always looking for someone to hit. He and Landon Collins have worked well during their short tenure together in Washington.

"I would've had a lot of fun playing side-by-side with Montae [Nicholson]," defensive quality control coach Kyshoen Jarrett said on The Rundown ahead of training camp. "He just flies around, he hits and things of that nature, but being able to coach him and teach him -- he's questioning you but not questioning you in a sense of negativity. He wants to know the why, and that's going to allow him to be in the best position possible."

-- First-round rookie Montez Sweat displayed his promise during a single rep at the beginning of practice Sunday. Going against Penn, a 12-year veteran, Sweat used his speed to beat the left tackle inside and get to Keenum for a would-be sack.

"He had a decent day yesterday," Gruden told reporters Sunday morning. "We added more reps to his plate and he looked like he handled it pretty good – came out clean. Just add more and more reps today and then have an off day tomorrow and then see where he's at Tuesday and hopefully we'll get him some playing time."

Quick hits:

• Starting corner Quinton Dunbar, who Gruden said is dealing with some soreness, did not practice for the second straight day. Rookie Jimmy Moreland again replaced him on the outside opposite Josh Norman.
• Marquis Flowers showcased his coverage ability throughout Sunday's session, even breaking up a pass near the goal line towards the end of practice. Flowers is currently listed behind fellow inside linebackers Shaun Dion Hamilton and Josh Harvey-Clemons on the depth chart but could see more playing time depending on how long Hamilton (chest) is sidelined.