Wide receiver Michael Crabtree will be added to the 49ers’ 53-man roster within the next six days.

It’s even possible Crabtree could be on the roster prior to the 49ers’ game Monday night at Washington, but that does not mean he will suit up for the game.

Based on his participation last week in practices, it does not appear likely Crabtree will be available for the 49ers’ next game. After one week of practices leading up to the 49ers’ game against the Carolina Panthers, the organization decided to back off on Crabtree’s participation a week ago.

The team wanted a more controlled environment in which Crabtree could continue to rehabilitate from surgery to repair the torn right Achilles tendon he sustained six months ago.

So it seems unlikely the 49ers would rush him back onto the chaos of an NFL game just a week later.

However, the 49ers could keep people guessing, too. With their last practice of the week and before heading to Washington, the 49ers could make the roster move to place Crabtree on the 53-man roster. After all, it’s a move that must be made no later than Tuesday, anyway.

Once Crabtree was cleared to practice on Nov. 5, the clock started on a 21-day window. The 49ers can activate Crabtree at any point within that three-week window. At the end of 21 days, the club must either move him from the reserve/physically-unable-to-perform list to the 53-man roster or place him on season-ending injured reserve.

The 49ers expect Crabtree to play this season and, perhaps, return to his No. 1-wideout form for the playoffs. He will definitely be placed on the 53-man roster before the end of the day Tuesday.