RICHMOND, Va. -- Redskins.com's Ryan Fowler breaks down the key plays and highlights from Day 4 of training camp at the Bon Secours Washington Redskins Training Center on Sunday.
-- The youth-infused receiving core provided glimpses of their potential throughout practice. After missing the entire 2018 season due to a knee and leg injury, Robert Davis arguably had the highlight of camp thus far. In red zone 11-on-11 drills, Davis rose above Adonis Alexander, snatching the ball out of the air for a touchdown and drawing a raucous applause from fans in attendance. Later in the session, rookie Kelvin Harmon created a similar reaction with diving catch in the back corner of the end zone on a pass from Case Keenum.
-- Gruden said Sunday that Trey Quinn has pretty much locked up the starting slot receiver spot, and he's looked the part so far in Richmond. The last pick in the 2018 draft, Quinn has consistently run crisp routes and displayed sure hands. At one point, wide receivers coach Ike Hilliard asked Quinn to "take off those gloves, that's not fair," after Quinn snatched a wobbling ball from McCoy out of the air during team drills.
-- Quarterback Colt McCoy returned to practice Sunday, working with all three offensive units. There does not seem to be any ill-effects from offseason surgery, as he showed off his athleticism by shuffling and high-stepping over bags in individual drills.
-- Dwayne Haskins and Case Keenum also worked with the starting unit, with all three quarterbacks showing precision and an increased comfortability within the offense. Haskins looked especially comfortable throwing multiple touchdowns, including two to Jeremy Sprinkle. The third-year tight end was a prime target for all three quarterbacks throughout the day with veteran Jordan Reed receiving a day off.
-- During Jay Gruden's press conference Sunday morning, he mentioned he is looking for each quarterback to be fluid in "announcing protection changes and audibles at the line of scrimmage." Haskins showed exactly that in one instance during the practice session. Facing a four-man front and a Cover 3 look from the defense, Haskins immediately motioned to receiver Cam Sims by shouting "alert, alert" while pounding his fists on his helmet. Sims keyed the change, took a step towards the line of scrimmage and eventually connection with the first-round rookie on a short reception.
-- As for Keenum, the veteran takes every rep with a meaningful purpose. In early morning route-tree drills with wideouts, Keenum dropped back and moved around the pocket as if there were a swarm of defenders around him, allowing him to spray the ball around the field from different arm angles.
-- After three tough days facing the defense, the Redskins offensive line bounced back with a much-improved session. Rookie Wes Martin showed excellent footwork at times Sunday, stuffing both Jonathan Allen and Daron Payne during team drills. Heralded in college for his elite strength, Martin has shown progression each day of camp working in between reps with offensive line coach Bill Callahan. With left guard a question heading into the upcoming season, having Brandon Scherff opposite him gives the rookie a reliable shoulder to lean on. At Morgan Moses' post-practice press conference Sunday, he mentioned "there's not another guy I'd rather play beside than Brandon [Scherff]."
- Adrian Peterson showed another side of his game by beating linebacker Jon Bostic and catching a touchdown pass during the red zone portion of 7-on-7 drills.
- Haskins ran multiple read-option plays during team drills. On one occasion, with Derrius Guice by his side, Haskins faked the toss out wide, tucked the ball and sprinted upfield for what would have been an easy first down.
- Haskins looked looser and more comfortable on the field Sunday. On multiple occasions, the rookie signal-caller sprinted to celebrate with teammates after touchdown passes. He also has a handshake with seemingly every one of his Redskins teammates.
Take a look at the photos from the fourth day of 2019 training camp in Richmond, Va.
-- The temperature wasn't the only thing that intensified Sunday, as the session included full pads and heavy contact as the summer sun beat down on Redskins practice.
-- Linebacker Cole Holcomb worked with the starting unit alongside Shaun Dion-Hamilton during some team drills and 7-on-7 sessions. Early in practice, Holcomb broke up a pass intended for Sims with a high hit that jarred the ball loose -- an effort that earned high fives from teammates. But on the next play, Jeremy Spinkle beat Holcomb up the seam and Haskins delivered a well-placed pass for a would-be touchdown. The sequence served as a lesson for the rookie about consistency.
-- Safety Landon Collins enjoyed another productive practice, kicking off 7-on-7 drills with another over-the-top breakup on a pass intended for Vernon Davis near the goal line. The two veterans have been matched up frequently thus far in camp, with Collins and Davis each coming away with 1-on-1 victories.
- Montez Sweat and Ryan Anderson primarily worked with the first unit on defense in 'base' coverage.
- Rookie linebacker B.J. Blunt received reps with the starting unit at inside linebacker alongside with Marquis Flowers, who has drawn praise for his efforts.
-- Trey Quinn, Greg Stroman, Byron Marshall, Jimmy Moreland and Shaun Wilson all practice returning kicks.
-- Dustin Hopkins was successful on all six of his field-goal attempts hitting from distances of 33, 40, 42, 44, 45, and 47 yards, respectively.
-- Tress Way was seen launching punts on the back field from his own 10-yard line to the opposite 10 for an 80-yard boot. In his sixth-year in Washington, Way is looking to build off a career year in 2018.