From McNair down, the Kings are well aware this roster needs an upgrade, if not multiple. More specifically, team sources say they’re prioritizing backup center and the wing spots. There are some familiar names who appear to be back on their radar, league sources said. Among them: Portland’s Jerami Grant, Utah’s John Collins or Washington’s Jonas Valančiūnas and Kyle Kuzma. Brooklyn’s Cam Johnson is known to be of significant interest, as is — to a lesser degree — the Nets’ Dorian Finney-Smith. The notion of adding a high-profile player like Zach LaVine (Chicago) or Brandon Ingram (New Orleans) is believed to be very unlikely, but the Kings have made a habit during the McNair-Wilcox era of exploring any and all possibilities that might improve the team, even if they don’t appear to make sense at first glance.