Jon Gruden, Derek Carr riding bumpy road together with Raiders

The Oakland Raiders finished the first half of the season with a 1-7 record. Here’s a look at how they have fared and what’s ahead:

First-half rewind: The Raiders are in deconstruction mode after attempting to put together a competitive roster of older veterans and untested newbies in the offseason. Trading away Khalil Mack on Sept. 1 showed returning coach Jon Gruden was tired of waiting for the All-Pro edge rusher to end his holdout and was the first sign that the Raiders were not in it to win a Super Bowl this season. Not with the two first-round picks acquired from the Bears not showing up until the next two years. The trade of Pro Bowl receiver Amari Cooper, as inconsistent as he has…