Reliever Zach Britton agreed to a three-year, $39 million deal to return to the New York Yankees on Saturday, league sources told ESPN, fortifying one of the game's best bullpens after it lost reliever David Robertson in free agency earlier in the week.

Britton's deal includes both a club option and a potential player opt-out, according to sources. The Yankees can exercise a fourth-year option after the 2020 season worth $14 million, making the total value of the deal up to $53 million, sources said.