ALAMEDA, Calif. -- Listen closely enough and you can make out the rising sound of a bugle, coming from the top of Mt. Davis.
Beset by injuries throughout the defense, here comes the cavalry for the Oakland Raiders.
But instead of soldiers on horseback, there's a linebacker in Will Compton, fresh off recording a podcast from a broken-down bus in a Nashville warehouse and hawking "merch" in a Nissan Stadium parking lot. There's safety D.J. Swearinger, who spent the past month-plus reading books, working out and gearing up for another shot. And there's edge rusher Dion Jordan, a former No. 3 overall draft pick who just finished serving a 10-game suspension for taking Adderall, a violation of the…