Morning,
I downloaded the first picture and used PhotoME on it to extract the exif metadata. You are using a K20, f 3.5 with a lens using a focal length of 63mm. Went to a DoF calculator at
Online Depth of Field Calculator
and entered the information, guessing the distance to the subject at 5 feet. This resulted in a depth of field of 4". If the distance was 10 feet the DOF would be 1 foot. Not a lot. It really depends on your focus point. It looks close, but its difficult to tell exactly where it is. To open up the depth of field, you would need to stop down some more, to say f5.6 (at 5 feet dof is 5"), f8 (at 5 feet dof is 7"), at f13 (at 5 feet dof is 1 foot). Either that or to back up a bit and increase the distance, but if you zoom in a bit more to say 100mm, you have achieved nothing as the dof goes back down. The best solution is to stop down to around f13 and have a bit more depth of field to get the subject in focus. If you backup some, adding distance, keep the same focal length and then crop to get the image you desire.
All in all, you have a great background and a wonderful picture. The gentleman is really well defined and pulled out (isolated) from the background.