Actually two weeks:

Arizona exercised its side of a mutual contract option on Henry Blanco.  Blanco declined his side of the option.  Arizona then signed Blanco to a contract for 2012 with a mutual option for 2013.
Detroit assigns Brad Thomas outright to AAA Toledo.
Mets reinstate Johan Santana from the disabled list.
Philadelphia releases Juan Morillo.
Seattle re-signs Carl Willis as pitching coach.
Toronto declines its 2012 option on Jon Rauch.
Toronto re-signs Bobby Korecky.