Cmdr. Bryce Benson has waived his right to a hearing to determine if he should face criminal charges in the incident.
Defense attorneys say officers aboard the Fitzgerald were strong performers whose equipment didn't work properly.
A preliminary hearing for two junior officers at the controls of the USS Fitzgerald highlighted a series of errors.
The former CO of the USS Fitzgerald and three junior officers from the ship are set to appear at hearings next month.
Senators were discussing plans to delay the confirmation hearing for President Trump's pick to be Veteran Affairs secretary.