The Cleveland Indians have granted Daisuke Matsuzaka his unconditional release upon his request, the team announced on Twitter. Matsuzaka was released by the Tribe at the end of Spring Training but worked out a new minor league deal with the team shortly after.
RHP DAISUKE MATSUZAKA has asked for & been granted his unconditional release from the Cleveland Indians organization.He is now a free agent
— Cleveland Indians (@tribeinsider) August 20, 2013 
Source: MLB Trade Rumors