Athletics signed LHP Sean Doolittle to a four-year contract extension. The deal was announced as a five-year contract, but it includes this season. The A's will also have club options for 2019 and 2020. The financials of the contract are not yet known. Doolittle would have been eligible for arbitration for the first time this winter, so the new deal will buy out his arbitration years and possibly his first two years of free agency. Doolittle holds a 3.10 ERA with 129 strikeouts over 125 innings over his first 122 relief appearances for the A's.