England manager Hodgson says he already knows most of the players who will form his 23-man squad for Brazil but he admits there are still a few places up for grabs.
McManaman, 22, is one of those still on Hodgson's radar even though he is currently playing in the Championship with the Latics.
"I can't honestly say I've got 18 names stamped with five more to come. I can't because there is a lot that can happen between now and May," Hodgson said.
"We've got a few on the fringes who we look at, like Callum McManaman for instance.
"We were talking about him the other day. He was flying for Wigan at the end of last season and then he got that unfortunate injury, so he's one we'll have a look at.
"We have been following his progress. There are certain players like that who aren't out of our radar.
"I would be lying if I didn't say he has a lot to do (to make the World Cup squad), but it is certainly not impossible."