Starter Armature Assy. Wear

[mole2000]

So I've been having some starter problems for awhile. Pretty much anytime I get the engine started it drains the battery. I decided to take it out and test it to see what I could find. As you can see the armature assembly was worn with a matching area on one of the field coil steel pieces. My first thought is that this is not good, but I don't know how bad it is.

Any experience with this you could share?

Thanks!
Tim