ALLEN PARK -- The Detroit Lions will take their first off day of camp on Tuesday. But first, they squeezed in one more workout, their fourth straight day of work, on Monday during a sun-splashed morning at team headquarters. Here are some notes.

-- At this rate, it's going to be difficult to slow down the Frank Ragnow hype train. Since the pads went on Sunday, perhaps no lineman has dominated his one-on-one reps more than him. That includes handling Christian Ringo with ease Monday, then taking Sylvester Williams to the ground in his second go. Elsewhere in those drills, I had Graham Glasgow, Joe Dahl and T.J. Lang all winning their reps. It was another really good day for the offensive line, in a drill where they struggled mightily at this point last year. Progress? Too early to say, but the early receipts are promising.

-- Golden Tate probably had the catch of the day, pulling in a one-handed grab as he spun around Teez Tabor near the sideline. But I thought it was interesting to see Brandon Powell get a rep with Matthew Stafford too. The UDFA usually gets in his work with Matt Cassel or Jake Rudock, along with the rest of the reserves, but he got a chance to take a ball from Stafford and made the most of the opportunity by beating the speedy Jamal Agnew for a nice catch across the middle. He got Agnew toward the end of practice too for a long TD. Powell is going to struggle to make the roster because of the depth at the position, but the rookie clearly has done enough to intrigue coaches in the early days of camp.

-- Detroit put in a lot of work in the red zone today, and the defense held up really well. During one sequence, Darius Slay smothered Kenny Golladay so tightly that he broke up the pass with his helmet. Matthew Stafford looked for Marvin Jones on the next play, but Quandre Diggs was all over him and forced a harmless pass through the back of the end zone. On third down, Jarrad Davis came clean off the blitz and would have sent Stafford into Washtenaw County if this were live.

-- Once again, the Lions side-stepped an injury scare on offense. Running back LeGarrette Blount returned to the field after leaving Sunday's practice early with an undisclosed injury. Receiver Marvin Jones also left a practice early before returning the next day. These early days of camp are important for building a foundation for the season, of course, but staying healthy at key positions is just as important. And heading into their first break, they've done that.

-- Of course, that's not to say they're at full strength either. They continue to practice without their top pass rushers at both defensive end (Ezekiel Ansah) and linebacker (Devon Kennard). Another defensive end, Cornelius Washington, hasn't practiced either. Tavon Wilson, Stefan McClure, Chad Meredith and Cam Johnson did not practice Monday, and rookie defensive lineman Da'Shawn Hand left early with a right knee injury. He stuck around to watch the rest of the workout, but did so with a big ice pack wrapped around the knee.

-- With the off day coming Tuesday, many players remained on the field after practice to get in some extra reps with teammates and assistant coaches. That includes a few big guns like Marvin Jones and Kenny Golladay, who worked on their toe-tappers around the end zone with Mathew Stafford. The wideouts also spent time on the JUGS machine before calling it a day. And another veteran, Glover Quin, remained on the field for about a half-hour to talk shop with Teez Tabor, Darius Slay and DeShawn Shead. They all declined to comment, but judging by the postures and hand motions, they were clearly talking about how to press receivers. Quin's play on the field speaks for itself, but I don't think he gets nearly enough credit for how much he helps the other defensive backs off the field either. Perhaps nobody has played a bigger role in the maturation of Darius Slay, his neighbor in the locker room, and it seems Tabor is becoming his latest pupil.

-- With Tavon Wilson taking the day off, Rolan Milligan got a rare chance to reps some with the starters. Milligan had a cup of coffee with the Lions in 2017, though spent most of the year on the practice squad. He's built more like a linebacker than a cornerback, and was used today in that linebacker/safety hybrid role. He's fighting with Miles Killebrew for one of the final jobs in the defensive backfield.

-- Another day of training camp, another day of Marvin Jones eating DeShawn Shead's lunch. Seriously. Jones has ripped that guy all over the field during the first four days of camp. Then again, he's been one of the best players during the first week of camp overall. Hell, he even separated from Darius Slay during one-on-ones. It's still so early, but at this point there's no reason to believe he can't pick up where he left off last year.

-- For the second straight day, Detroit had the tight ends square off against the defensive ends during a one-on-one run blocking drill. And for the second straight day, Michael Roberts lost his first rep before battling back with a win on his second. His blocking came a long way last year, but it has been inconsistent while working mostly against Jeremiah Valoaga in camp. But allow me to repeat: He has great hands. They're big, too -- massive, actually -- and he uses them to just swallow up the ball, even in tight coverage. Miles Killebrew was draped all over him during one-on-one drills, but Roberts just boxed him out for the ball. You're going to see this guy involved in the passing game this season.

-- Don't be alarmed -- please, for the love of God, don't be alarmed -- but the Lions did some more running today. The offense was forced to take an extra lap too when their was a botched exchange between Wesley Johnson and Matt Cassel.

-- Matthew Stafford has started 112 straight games, which is the eighth longest streak by a QB in NFL history. Good thing, too, because this team is lost without him. Neither Jake Rudock nor Matt Cassel has inspired confidence with their consistency -- or lack of it -- while working with the reserve units.