KANSAS CITY, Mo. (AP) - The Kansas City Chiefs have traded wide receiver Jon Baldwin to the San Francisco 49ers for wide receiver A.J. Jenkins in a swap of disappointing first-round picks.

Baldwin was the 26th overall pick of the Chiefs in 2011. He missed time his rookie season after getting hurt in a fight with a teammate, and has been prone to dropping passes. He has just 41 catches for 579 yards and two touchdowns in two seasons.

Jenkins was the 30th overall pick of the 49ers last year. He appeared in only three games as a rookie and did not make a catch, even though he was healthy all season.

It's the second significant deal between the Chiefs and 49ers this year. Kansas City acquired quarterback Alex Smith from San Francisco for a pair of draft picks during the offseason.