L.A.
These sleep issues will pop up every once in a while like SH and Dawn said..
Is he tired when you put him to bed? Does he maybe need to go to bed a little later?
Do you all have a quiet routine when he comes home from daycare?..
Quiet dinner.. no TV...
Make sure dad does not come home and start tickling, chasing and too much wild crazy playing.. It takes a child a very long time to calm down.
He also should be calm in the tub.. Quiet bath.. Maybe use a lower watt light bulb.. Use strong strokes when you wipe him with the wash cloth..
No TV's.. No Cell phones calls around him.. It makes him think there is a lot of excitement going on without him..
When you read him a story at night.. rub his head his arms, his back.. like a massage. DO NOT engage him in the book.. This is not the time to be animated or asking him questions..
As you read each page, read .....slower.
Then when you leave his room.. You are done for the night. His room is child proofed so no matter what he does in there he is safe.
So what if he ends up sleeping on the floor? Kids do not get sore like we adults would.. Leave him in there with the door closed.