Ronnie Moore is still thought to be keen on the youngster after he was linked with a move to Aldershot over the summer, then joined up with Vale boss Micky Adams.
Moore is still on the lookout for pace and after his spell with the Millers last season, Bell-Baggie could be an option.
Royals boss Brian McDermott told Sky Sports online: "There will be interest in him because he is a very promising youngster, but until someone makes the call we can't get the ball rolling.
"Rotherham did have an interest before he went to Port Vale, he enjoyed his time there last season, but we will just have to wait and see what pops up for him."
Meanwhile Jeremiah Ani has left Rotherham after his one month contract came to an end.