Yes - but you need to be careful
You can start C or SP or RP
But you have to watch if there are players that can play in that position as well as a position that is already underway.
as an example - I don't think there are any SSs or 2Bmen who play CF. So they could be started as well, right now.
But you couldn't start RF, LF and probably not 1B or 3B but I haven't looked.