What's Jon Gruden's plan after drafting two more offensive linemen?

ALAMEDA, Calif. -- Was it not just a year ago that the Oakland Raiders were seen as returning one of the best, most physically intimidating offensive lines in the NFL?

A unit with three Pro Bowlers in left tackle Donald Penn, left guard Kelechi Osemele, who was also named All Pro, and center Rodney Hudson with a rising star in right guard Gabe Jackson had added capable right tackle Marshall Newhouse in free agency and reinforcements in the 2017 draft in David Sharpe and Jylan Ware.

And yet …

Whether it was because of a change of scheme, age, Penn’s training camp holdout, the arrival of Marshawn Lynch or simply some bad juju picked up in Washington, D.C. in Week 3, the line just was not the…