Can the contractor file a lien based on these circumstances?

If my contract states the completed projected should have been approximately Nov. 21, 2019, but the contractor walked off due to dispute a few weeks ago and now claims I still owe him $8,000 for work done (with no itemization of what this is for), can he file a mechanics lien if I disagree that I owe him this. I already paid him up to the point of where I thought I should have for the work he already did and I told him he had already breached the contract because he went this far over the date agreed upon, especially since he had no valid reason for delay. I asked him to just leave the job in the past, but he kept working into the next draw (despite me texting him that I was not going to pay him, mostly due to being so far behind and never working on schedule, etc.). I just need to know if he has a leg to stand on.