Are Jon Gruden and Mike Mayock quickly putting together a pretty decent roster for the Oakland Raiders? It’s starting to look like it, for the most part. Quarterback Derek Carr is, at the least, solid and serviceable. His wide receiver group is vastly upgraded with the addition of Antonio Brown and Tyrell Williams. The team spent big on left tackle Trent Brown and, theoretically, 2018 first-round tackle Kolton Miller will get better in his second season. On defense, the Raiders still have holes, but they’ve added a few starters in free agency. That takes the Raiders to the 2019 NFL Draft, where Gruden and Mayock can continue the rebuild. Helping that cause is having four of the first 35 picks. That many high picks could lead the Raiders to taking a risk on a big-upside player with one of them.