An "asset" is something useful or valuable that you have.

When you call a person "an asset", it means that they're really useful, helpful, or valuable. A person can be an asset to a company, a team, or a community.

In a company, people often call groups of people that work together "teams".

For example:

Ideally, I'd like to be responsible for managing a small team of my own.

Well, I think you'd be a great fit for our team.

Sports-related terms and phrases are actually really common in business.