KANSAS CITY, Mo. -- The depth chart the Kansas City Chiefs brought out of training camp already has been through more changes than they had hoped. They lost starting safety Eric Berry for the season after he tore his left Achilles tendon in last week’s game, this following the core muscle surgery to starting cornerback Steven Nelson. The Chiefs are hopeful Nelson will return to play sometime in the second half of the season.

“Unfortunately we’ve had to go through that before," defensive coordinator Bob Sutton said. “You’ve got to try to march on. We’d love to have our full complement of players all the time, but that just doesn’t happen in the National Football League."

So where do the Nelson and Berry injuries leave the Chiefs in the secondary?

They have five cornerbacks, led by Marcus Peters, who was in the lineup for all of New England’s offensive snaps in last Thursday's win over the Patriots. The other starting cornerback was Terrance Mitchell, who struggled at times in coverage and was penalized four times, twice for pass interference and twice for holding, giving the Patriots 48 additional yards.

Phillip Gaines played more than half of the game in New England as the third cornerback. The fourth cornerback, Kenneth Acker, played only on special teams and the fifth, D.J. White, was inactive.

At safety, the Chiefs have veteran Ron Parker, who like Peters played the entire Patriots game on defense. The Chiefs will at times use either Daniel Sorensen or Eric Murray to replace Berry. The Chiefs this week re-signed as their fourth safety Steven Terrell, who went to training camp with Kansas City but was released on the cut-down date.

Sorensen has played a lot for the Chiefs as a spare safety the last couple of seasons. He was in the game for more than half of New England’s offensive plays.

Murray is more of an unknown, having played mostly on special teams since joining the Chiefs as a fourth-round draft pick last year. He played mostly at cornerback in college at Minnesota.

“He had a great camp and preseason, played really well," Sutton said. “I think he’s very confident in himself and the system. He made the transition from corner to safety a year ago and I give him a lot of credit because he attacked the position, demanded a lot out of himself. His practice habits are outstanding and I think that’s why he’s been able to make this jump that I think we’ll all see when he gets out there and plays."