The Detroit Lions now have all seven of their drafted rookies under contract.

Second-round pick Tate Ratledge’s deal has been made official, the team announced Friday.

Ratledge, an offensive guard who started 37 games over five seasons at Georgia, was selected with the 57th overall pick in April’s draft.

The previous delay in Ratledge’s agreement — all six of Detroit’s other drafted rookies have been signed for weeks — likely stemmed from a league-wide issue with second-round picks.

The Houston Texans gave their second-round selection at No. 34 overall (receiver Jayden Higgins) a fully-guaranteed contract, a feature that has typically been reserved for first-rounders.

The Cleveland Browns followed suit with linebacker Carson Schwesinger, the 33rd overall pick.

That caused a stalemate, with the rest of the second-round picks wanting full guarantees and NFL teams not wanting to set that precedent.

Ultimately, the San Francisco 49ers and defensive lineman Alfred Collins reportedly came to a deal late Wednesday that guaranteed 88% of his contract, per ESPN, and the ball began rolling.

There were concerns Ratledge would miss portions of training camp — rookies reported Wednesday, and veterans are expected to arrive in Allen Park on Saturday — but those worries have now been assuaged.

Others who have made their pacts with the Lions official since April’s draft include first-round defensive tackle Tyleik Williams (Ohio State), third-round receiver Isaac TeSlaa (Arkansas), fifth-round offensive lineman Miles Frazier (LSU), sixth-round defensive end Ahmed Hassanein (Boise State), seventh-round safety Dan Jackson (Georgia) and seventh-round receiver Dominic Lovett (Georgia).

Ratledge is expected to compete for a starting role, at guard or as a replacement for the retired Frank Ragnow at center.

Second-year pro Christian Mahogany and veteran Graham Glasgow are the other players anticipated to start alongside Ratledge along the interior of Detroit’s offensive line.

Glasgow, 33, was the starter at left guard last season and has played center in the past.

Mahogany looked promising in a limited sample size.

“He plays the game the right way,” general manager Brad Holmes said of Ratledge on April 25.

“He’s tough; he’s physical; he’s a lot more athletic than you may think and he has more versatility than people may realize.”