There are (was) 13 hawks for the RAFAT. With one downed and the other crippled, it's now 11.
Red's 1-9 are the display pilots, Red 10 is Road Manager (commentator, coordinates with bos during display, flies hawk for photo ops for the main 9-ship etc.) and then Red 11 (don't ask me what his job is!). No back-up display pilots as they would never be able to replicate the high standards required in each position of the formation.
Hope that answers your question Green Flash. Wasn't sure if you were talking about the aircraft or the pilots
