I have several Musials. I think it's okay. Stan used two different Ms when signing his last name. An up and down M and an M that starts off with a loop. He also never followed through on the last letter L. The Aaron's too obscure. Maybe post a clearer picture. The Anderson, I have no clue. Hopefully someone will chime in. Comparing it with others, it looks okay. I've never heard of Anderson's autograph being forged.