Most know me only by my last name

I’m well liked and have a measure of fame

I’ve been stuck in a rock

I’ve been buried in a lake

I’ve won 1000 wars for goodness sake

I’m a good buddy with a king

Some people say I make quite a sting

But I’ve been retired for quite a long while

My last owner left me on top a junk pile

I’m a bit rusty here and there

I could use a bit of tender loving care

Bobby Excalibur is the name

And whoever picks me up, will never be the same