George is in his late 40s and never had his tonsils removed. he is also overweight and reports that though he thinks he sleeps through the night, he is always tired. what sleep disorder should george to be tested for?

For obstructive sleep apnea (OSA).
OSA is a severe form of sleep disordered breathing, in which breathing completely stops or decreases until he wakes up enough to open the airway and start breathing again.
George does not wake up completely, but goes to a lighter phase of sleep, and this explains why is always tired.
The fact that he has his tonsils may indicate that they are swollen, plus the overweight contribute for the cause of OSA.