The Chicago White Sox have agreed to a two-year, $18 million deal with Kelvin Herrera, according to league sources.
The deal includes a vesting option for a third season.
Herrera could become the closer for the White Sox.
His option for 2021 will vest if he pitches in 110 games over the next two seasons and 55 in 2021, according to sources.
Via Jeff Passan/ESPN