Evening AFC West notes

Oakland veteran cornerback Chris Johnson said he will definitely be ready to play at Denver in the season opener in 13 days. Johnson returned to practice Tuesday after having surgery for an undisclosed minor injury. Johnson’s presence at Denver should help Oakland. Several young cornerbacks have struggled in the preseason.

Meanwhile, fourth-round pick Chimdi Chekwa could move to safety soon. He was drafted as a cornerback. Oakland has been working veterans Michael Huff and Tyvon Branch at cornerback as well as at their normal safety positions, but they likely won’t be moved anytime soon, unless there is an emergency.