Raiders’ Gruden promises changes on defense vs. Jaguars

Tahir Whitehead (59) of the Raiders can’t prevent a touchdown catch by Jonnu Smith as Erik Harris (25) looks on against Tennessee.ALAMEDA — In absence of specifics, Jon Gruden offered a promise regarding his struggling defense.

“We’ve got to play better, and we’re going to play better, and there will be changes,” Gruden said Monday at his weekly press conference. “There will be changes. What happened yesterday will not happen again. I can’t allow it to happen.”

Sounds reasonable the day after the Raider gave up 552 yards and 9.4 yards per play in a 42-21 loss to the Tennessee Titans. Tennessee came in as a middle of the road offensive team, and the Raiders actually played much better in the…