The Las Vegas Raiders brought in a new regime of Pete Carroll and John Spytek this summer, and with them, an excellent coaching staff and front office team. Both come from winning backgrounds, and they've used their connections all offseason to build the Raiders' roster.
Carroll's days with the Seahawks brought the team Geno Smith, Jamal Adams and Stone Forsythe, and Spytek's years with the Bucs netted Las Vegas Devin White and Alex Cappa. Spytek also brought several Eagles executives into the Raiders' front office, which spurred a trade for Thomas Booker IV.
Las Vegas could do much worse than pulling players from Seattle, Tampa Bay and Philadelphia, but it seems like every new addition has some kind of prior connection to a key figure in the organization.