Both Jenkins and Baldwin were first-round picks -- Baldwin in 2011, Jenkins in 2012 -- and neither has lived up to his draft spot.
“Both players have been presented a great opportunity for a new beginning with their respective teams,” 49ers General Manager Trent Baalke said.
Baldwin has started 10 of the 26 games he’s appeared in, with 41 catches for 579 yards and two touchdowns. His 2,337 yards receiving at University of Pittsburgh rank eighth in school history.
Jenkins, who played at University of Illinois and was something of a surprise first-round pick, appeared in three games for the 49ers last season and did not catch a pass.
“We felt like this trade was beneficial for all parties involved,” Chiefs General Manager John Dorsey said, according to the Kansas City Star. “A.J. is a talented individual with a skill set that we feel can add value to our football team. Jon Baldwin is a hard-working player and a professional. We wish him nothing but the best moving forward.”