These four were optioned to Durham:
RHP Jason Hammel
LHP Chris Seddon
1B Wes Bankston
IF Elliot Johnson
Per Lancaster's blog, suffice to say I won't be missing Seddon, though it appears any hopes Jason Hammel had at the 5th slot are dead.
The Rays play the Josh Hamiltons tonight, with Edwin Jackson starting along with Stokes and Howell, basically the three (along with Ryu) vying for that 5th rotation slot / bullpen spot.