The Boston Red Sox have signed Koji Uehara to a two-year, $18 million contract to remain their closer.

Boston signed Uehara, 39, before he became eligible to negotiate with other clubs next Tuesday.

The deal nearly doubles the two-year, $9.25 million contract he signed with the Red Sox before the 2013 season.

The Philadelphia Phillies have re-signed Jerome Williams to a one-year, $2.5 million contract.

Williams had a 2.83 ERA in nine starts for the Phillies after being claimed off waivers from the Texas Rangers on Aug. 10.

The 32-year-old has pitched for seven teams in his nine-year career.

The Tampa Bay Rays have signed Michael Kohn to a one-year Major League deal.

Tampa Bay's roster is now full at 40 players.

Kohn, 28, elected free agency after being designated for assignment and outrighted in early September by the Los Angeles Angels.