The Detroit Lions have their rookie minicamp scheduled for this weekend at the Meijer Performance Center, which means we get to see Detroit's draft picks, undrafted free agents and tryout players on the field for the first time.

It's a fun time in the offseason as the rookies get their first taste of NFL life while preparing to join the veterans in OTAs in the coming weeks.

Here are five things I'll be looking out for during Friday's open practice to the media:

1. The plan for Ratledge and Frazier

The Lions walked away from the draft with a couple interior offensive line prospects, taking Georgia's Tate Ratledge in the second round (No. 57 overall) and LSU's Miles Frazier in the fifth round (No. 171).

Ratledge played primarily right guard for the Bulldogs, while Frazier played right guard, left guard and right tackle in his three seasons at LSU. The Lions have two open starting guard spots after Kevin Zeitler left in free agency. There's a number of veteran options at guard, including Graham Glasgow and Christian Mahogany, but Ratledge and Frazier certainly hope to push the vets for those spots.

Lions offensive line coach and run game coordinator Hank Fraley will cross-train both players at multiple spots, including center, but it'll be interesting to see where both start out during Friday's practice.

2. Williams' first step

We talked to Ohio State defensive line coach Larry Johnson following Detroit's selection of Buckeyes' defensive tackle Tyleik Williams with the 28th overall selection in the draft. Johnson talked about how rare an athlete Williams is with his ability to move the way he does at his size (6-3, 334). Lions general manager Brad Holmes also touted that part of Williams' game after the selection.

A two-year starter for the Buckeyes, Williams played mostly in the three-technique for the Buckeyes' defense and was an elite run defender and disruptor. He combined for 100 tackles, 18.0 tackles for loss and 5.5 sacks the last two seasons. That's terrific production from a three-technique interior defender.

Minicamp isn't conducted in full pads, so it's hard to truly evaluate the big guys upfront, but Williams' athleticism, speed, footwork and first step will be on display for the first time and will be fun to watch.

3. TeSlaa's playmaking

Wide receiver Isaac TeSlaa is an intriguing prospect that Holmes spent a lot of draft capital to move up 32 spots in the third round to get. A move like that tells me Holmes really likes the player and has a good idea of how he can initially be used.

TeSlaa's a big-bodied receiver (6-4, 214) with tons of big-play potential, mixing that big frame with 4.43 speed. He ranked fifth in the SEC last season with a 19.5-yard average per reception. He makes plays down the field and after the catch, and we'll be on the lookout for some of that this weekend.

He could make his earliest impact on special teams, however. What roles will he have on teams? Could returner be part of the mix? He's one of Detroit's more intriguing draft picks.

4. Hassanein's motor

Again, it's hard to really evaluate offensive and defensive linemen until the pads come on in training camp and the hitting really starts. But one thing Holmes talked about after selecting Hassanein in the sixth round (No. 196 overall) was how hard he plays and how his motor never stops. That part of his game can be evaluated pads or no pads.

The Boise State product totaled 17 quarterback hits (third-most in the FBS) and 62 total pressures (fifth-most) while collecting 9.5 sacks and 15.5 tackles for loss last season.

"We acquired him because he plays with his hair on fire, and as, let's call it developmental, as he is, he just — he plays hard," Holmes said. "What do you have to do at that position? You've got to set edges and win rushes, and when I say win rushes, it's not just getting a sack, you can win rushes just by harassment and power and collapsing the pocket and just sheer effort."

5. Undrafted players

Holmes and head coach Dan Campbell have always viewed their roster as an open competition, and they don't care how a player gets to the roster. If they can play, they will be on the field.

Tight end Brock Wright and running back Craig Reynolds — plus a few others — have certainly proven that to be the case over the last few seasons after they entered the league as undrafted players.

The Lions' roster isn't at the same place it was when Holmes and Campbell took over four years ago. In fact, this is the most complete the roster has been heading into the offseason training program in their tenure. It will be tough for this group of undrafted rookies to crack the 53-man roster, but there's always an opportunity.

The Lions haven't announced their UDFA signings yet, but a few of the reported names that stand out to me are wide receiver Jackson Meeks (Syracuse), offensive lineman Mason Miller (North Dakota State), tight end Caden Prieskorn (Ole Miss) and edge rusher Keith Cooper Jr. (Houston).