PITTSBURGH -- The Pittsburgh Pirates' rebuilding process will include closer Felipe Rivero.
The team has signed the left-handed reliever to a four-year contract that runs through the 2021 season. The deal includes club options for 2022 and 2023.
Pittsburgh acquired Rivero in a trade deadline deal with the Washington Nationals in 2016. Rivero took over as Pittsburgh's closer last May, going 5-3 with a 1.67 ERA and 21 saves with 88 strikeouts in 75 1/3 innings for the Pirates.