No. You can only serve in one branch and component at a time. Even State Guard forces won't accept anyone who is currently a member of the federal military, whether it be in an active or reserve...
The meaning of condemn and waiver is not the same. Condemn means that the person has been declared guilty, while a waiver is a relinquishment of a claim, privilege, or right.
'Waived injured' means the team is releasing the player but the player is injured. The team is responsible to pay the player until his injury has healed. This is usually done by reaching an agreement...