Neil Critchley's side are paired with Sunderland, Wigan Athletic and Huddersfield Town/Oxford United in Group F.
Oxford travel to Huddersfield in a qualifying match on September 9 to determine the final line-up of the group.
The young Reds will take on each of their three opponents home and away, with the top two progressing to the last 16.
Fixture dates, kick-off times and venues will be confirmed in due course.