SANTA CLARA - When the 49ers floated the idea of trading for Jon Baldwin, coach Jim Harbaugh didn't have to dig too deep into the wide receiver's dossier.Marcio Jose Sanchez The Associated PressJon Baldwin didn't set the world on fire with the Kansas City Chiefs, but he didn't have much to work with either. In two seasons, he played under three offensive coordinators, and four players got starts at quarterback.Marcio Jose Sanchez The Associated PressJon Baldwin was such a good basketball player in high school that then-coach Tom Crean recruited him to play at Marquette.