I've had a mild stutter/stammer since my childhood and occasionally it'll show during a phone interview. I can be completely calm & relaxed during an interview and still stutter and there isn't really anything I can do about it.
Anyway, I'm wondering if it's better to announce that I have a stutter before a phone interview, or if it's generally regarded as "TMI". I'm afraid that if I do stutter during a phone interview, the interviewer might be weirded out and it could affect my chances at landing a new position.