Avery left Monday night's win against the New England Patriots with a groin injury and did not return. He has been ruled out for Sunday's game against the San Francisco 49ers and no timetable has been given for his return. He had two catches for 46 yards against the Patriots. In four games this season, he is the team's second-leading receiver with 14 catches for 156 yards.
With Avery out of the lineup, former 49ers first-round pick A.J. Jenkins is expected to start on Sunday. He was traded to Kansas City from San Francisco after his rookie season and has 12 catches for 146 yards in his three-year career.
Kansas City is 28th in passing offense this season and 16th in total yards per game. Tight end Travis Kelce leads the team with 18 catches, 259 yards and two touchdowns. Starting receiver Dwayne Bowe has 11 catches for 153 yards in three games after serving a one-game suspension for violating the league's substance abuse policy.
After opening the season 0-2, the Chiefs have won back-to-back games against the Dolphins and Patriots. Running backs Knile Davis and Jamaal Charles combined for 199 rushing yards during the Chiefs' 41-14 win over the Patriots.
The Chiefs play the 49ers in Santa Clara on Sunday at 4:25 p.m. ET.
- Paul Palladino