The #Chiefs have placed TE James O'Shaughnessy on Injured Reserve and were awarded DT David King via waivers from Seattle.— Kansas City Chiefs (@chiefs) November 17, 2015
O'Shaughnessy is an interesting case because I do think he can be the second or third tight end the Chiefs want him to be. Travis Kelce is obviously the main receiving option there but O'Shaughnessy and Demetrius Harris were splitting time as the second and third tight ends (often on the field together). He'll be back next year and figures into the Chiefs plans. The Chiefs now have Harris as well as Brian Parker, who was active for his second game last week.
As for the new player, the last Seattle defensive lineman the Chiefs signed worked out pretty well. Jaye Howard is one of the Chiefs top defensive players this year. King was originally an Eagles 2013 draft pick (post-Andy Reid) but also spent time with the Bengals. He is listed at 6'4 and 281 pounds so maybe he's a little more of the tweener type.