I'm trying to find pics where the logo or front of the jerseys are blocked by arms or the ball, or at the very least the pic will still look good cut off at the shoulders. Don't know if the back of the jerseys still can not be used. =/
You cannot use any tradmarked image. This includes the Kings logos and the name "Kings" on the front of the jerseys. Technically, they can even get after you for using the NBA logo itself (Jerry West's silhouette)...
All trademarked identifiers should be photoshopped out.
Technically, the 'Sacramento' logo is stylized and is most likely trademarked as a logo. I was not able to find this specifically mentioned on the Kings website, so...
The advice given to me when I worked with licensed products was do your best to understand to the rules and be prepared to react quickly if you get a warning letter!
This is a moch logo that I created. It is not a trademark infringement and most people wouldn't even notice the difference if you Photoshop this on the front of the jerseys.