YAML - When to use '-' character?

[deoren]

• https://www.reddit.com/r/ansible/comments/5jhff3/when_to_use_dash_in_yaml/
• https://yaml.org/spec/1.2/spec.html#Preview
• https://en.wikipedia.org/wiki/YAML
• https://docs.ansible.com/ansible/latest/reference_appendices/YAMLSyntax.html

-
  name: Mark McGwire
  hr:   65
  avg:  0.278
-
  name: Sammy Sosa
  hr:   63
  avg:  0.288

I kept mentally mixing up the - character with a Markdown list item, but that's not the case at all. Instead, this is what (I think) we're actually getting:

[
  {"name": "Mark McGwire", "hr": 65, "avg": 0.278},
  {"name": "Sammy Sosa", "hr": 63, "avg": 0.288}
]