Right-hander Luis Castillo and the Seattle Mariners are in agreement on a five-year contract extension that will keep the prized trade-deadline acquisition part of the ascendant team's core for the foreseeable future, the team announced on Saturday.
The deal is worth $108 million over the duration of the deal, sources told ESPN.
The contract, which includes a vesting option that could take its total value to $133 million, buys out four years of free agency for the 29-year-old, who has been dominant in eight starts since joining Seattle before the Aug. 2 trade deadline.