Here is the latest Mid-America sports news from The Associated Press

AMES, Iowa (AP) — Thanks to quarterback Brock Purdy, Iowa State’s playbook suddenly has more options. Purdy had a stunning performance in the Cyclones’ upset of Oklahoma State in what essentially was the college debut for the true freshman. He has given the offense a new look and a new sense of confidence. Next up is a home game Saturday against No. 6 West Virginia.

IOWA CITY, Iowa (AP) — Iowa has let its defense carry the load nearly all season. The Hawkeyes might need some more help from their offense this week at Indiana, like they got in last weekend’s 48-point explosion at Minnesota. The rugged Iowa defense looks a lot thinner at linebacker and in the secondary because of injury.

LINCOLN, Neb. (AP) — Nebraska freshman Adrian Martinez’s performances through four games already has him drawing comparisons to some of the standout quarterbacks coached by Scott Frost. He set school freshman records with 384 yards passing and 441 yards of total offense in a loss at Wisconsin. That was his second straight game with more than 400 yards of total offense. Northwestern coach Pat Fitzgerald calls Martinez a magician. The Cornhuskers visit the Wildcats on Saturday.

JACKSONVILLE, Fla. (AP) — The Jacksonville Jaguars have signed former Kansas City Chiefs running back Jamaal Charles to help during Leonard Fournette’s absence. The 31-year-old Charles worked out for the team in the morning and signed a one-year contract in the afternoon. The Jaguars lost third-string running back Corey Grant for the season and expect to be without Fournette for several more weeks.

KANSAS CITY, Mo. (AP) — The Chiefs placed right guard Laurent Duvernay-Tardif and safety Armani Watts on injured reserve and signed outside linebacker Frank Zombo to provide depth at that depleted position. Duvernay-Tardif broke a bone in his left leg with a few minutes left in Sunday’s 30-14 victory over Jacksonville. Watts had his promising rookie season cut short after hurting his groin in the game.

LOS ANGELES (AP) — UCLA freshman guard Tyger Campbell has a torn ALC in his left knee and will miss the upcoming season. That makes him the third player to be sidelined. The school says Campbell got hurt in practice last Sunday. He averaged 15.5 points and 7.2 assists as a senior at La Lumiere School in La Porte, Indiana. The 5-foot-11, 170-pounder is from Cedar Rapids, Iowa.