San Francisco 49ers wide receiver A.J. Jenkins, center, fumbles the ball as Denver Broncos safety Duke Ihenacho, left, makes a tackle and Broncos defensive end Robert Ayers (91) looks on during the second quarter of an NFL preseason football game on Thursday, Aug. 8, 2013, in San Francisco. (AP Photo/Marcio Jose Sanchez)

Chiefs trade Baldwin to 49ers

The Chiefs get 49ers wide receiver A. J. Jenkins in a trade of disappointing first-round selections.