Is this the one that attacked your broom then went off limping a while back?
I do wonder if he sprained/fractured/broke something....
You will need to get a hold of him and do an examination to determine if he has bumblefoot or not. As suggested, wait until he is roosting, take him from the roost and swaddle him in a towel. Have a helper and take photos of your rooster, his feet, spurs, eyes, etc.
Examine him head to toe to tail and in between. Look at his feet (the bottoms too). While you're at it, check him for lice/mites.
The stumbling and being clumsy? Can you get a video of that, upload it to youtube then provide us a link?
He may have something else going on besides possible injury. Sometimes a disease like Marek's can cause stumbling, he may have poor eyesight or even a vitamin deficiency.
Last but least...if he is attacking you, you have to carry a broom to ward him off, he bits, kicks, etc. then you may need to consider re-homing him with Full Disclosure of behavioral problems or if you are up to it, make a nice dinner.