The newest Lions arrived for this weekend’s rookie minicamp. But they won’t be seeing coach Dan Campbell. The Detroit Free Press reported that Campbell will miss the three days of practice because of “personal reasons.” No other details were provided. However, the team expects Campbell to be back later this month when OTAs head into Phase 3. During this period, all teams can go through 11-on-11 non-contract practices. The rookie minicamp, which starts Friday, allows all the first-year players to practice together without the veterans. Plus, the Lions brought in some players who didn’t sign as …