Updated

The San Francisco 49ers don't seem too concerned with wide receiver A.J. Jenkins' slow start to the preseason.

Neither does Jenkins.

The team's 2012 first-round draft pick has impressed teammates and coaches alike with his hard work and big-play potential this summer. But after an unproductive rookie season, there are immediate expectations for Jenkins to start delivering in games.

He didn't in San Francisco's exhibition opener last week against Denver, when Jenkins lost a fumble after his only reception. Jenkins and the 49ers are looking for better results when the team travels to Kansas City for Friday's game against the Chiefs.