Not every free agent was signed during the busy frenzy that pretty much began and ended on July 5 when free agency opened. There remain some pretty interesting players on the market, including Kings forward Dustin Penner . The big forward who was part of LA's Stanley Cup team two seasons ago never shut the door on a return to the Kings, but at this point it's looking less and less likely. The Kings are one of many teams this summer dealing with the crunch coming from the diminishing salary cap ceiling for next season with a lot of money already committed. GM Dean Lombardi doesn't seem to think fitting Penner back on the payroll is in the cards, he told LA Kings Insider Jon Rosen. It's one of those cap things, and I guess it's safe to say I have a limited amount of cap space left, and there certainly isn't going to be enough to -- I mean his requirements. I talked to him the other day, and I just told him. I talked to his agent a couple days ago and [said] 'This is where we're at. I've only got X amount left.' As it stands now the Kings have a little more than $5 million in cap space available however four Kings -- Trevor Lewis, Alec Martinez, Jake Muzzin and Jordan Nolan -- filed for salary arbitration on Wednesday. That doesn't count another restricted free agent who remains unsigned -- Kyle Clifford. Getting all of those guys under contract is a tough enough task, trying to fit in Penner is all but impossible. So at this point you know you'll see Penner in another sweater and despite his relative lack of production, there should be interest. One of Penner's old teams, the Oilers, have been popping up as potential landing spot. There surely are others interested as well.