The Milwaukee Bucks have agreed to an extension with small forward Giannis Antetokounmpo, the team announced Monday.

The extension is for four years and is worth $100 million, sources told ESPN.com.

The deal for the rising young prospect is for slightly less than the maximum salary, which would've been $106 million over four years, and contains no options, sources said. It's a strong deal for the Bucks, who lock up the multitalented young star and leave their five-year designated player slot open for possible use on Jabari Parker next year when he is eligible to sign an extension.

Giannis Antetokounmpo became the first player in Bucks history to record five triple-doubles in a season. AP Photo/Aaron Gash

In contract talks that played out over the summer, Antetokounmpo expressed a willingness to take slightly less than the max in an effort to help the Bucks retain their young core, sources said.

Antetokounmpo averaged 17.2 points, 7.8 rebounds and 4.4 assists last season. The Bucks are planning to use Antetokounmpo, dubbed the Greek Freak, at point guard at times this upcoming season.