Rooney moved back to his boyhood club in the summer after spending 13 glittering years at Old Trafford where he beat Bobby Charlton's record to become Manchester United's all-time top goalscorer.
It is understood Rooney has been offered a contract until the end of the 2020 MLS season.
"But in terms of clarity of whether Wayne is staying or leaving, I'll find out a little more later when he comes into training", the former England manager added.
But 12 months on he may face more embarrassing questions about his nightwear if his decision to agree a "deal in principle" with DC United leads to a move to the MLS.
"I've always looked at Wayne Rooney as someone who just wants to play football, wants to get on the ball, touch the ball 40, 50, 60, 70 times and sometimes that has been his Achilles heel".
Allardyce was asked about the proposed deal between the Washington-based MLS side and his Everton forward in his pre-match press conference and gave his reflections on the situation. "Glasgow is a tough city - if I was Wayne, I'd go to America".
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"He's (Rooney's) had a hard time since last summer but we've all come through that, Wayne included".
He scored the last of his 11 goals for the Merseyside club in December and manager Sam Allardyce has suggested he could not guarantee the player a regular starting spot next season.
Allardyce insisted yesterday that Rooney, who will not feature in...
"I have had to come here and work hard and get fit, make sure that I keep performing to play well".
One year on, it may be even more hard to succeed.
"It's a tricky question for me to answer", Allardyce said. If they don't play well you can't select them and if they do play well they stay in the team. That's it. Next season is already planned.