Perhaps I don't understand how the Rule 5 Draft works, but according to MLB.com, we also lost Ricardo Nanita, Robert Valido, and Jason Rice.
2015 Obligatory Attendance/Record Tracker
LAST GAME: May 7 - Tigers 4, Sox 1
NEXT GAME: May 22, Sox vs. Twins
THE NEXT ONE: June 8 - Sox vs. Astros