If I remember correctly, our worst defeat first time round was 4-0 to Sunderland of all teams.
As for last time, losing 5-0 to Man City was our worst result, then 5-1 to Utd and a couple of 4-1 defeats.
Sheffield Utd are on another level entirely. Losing 8-0, 6-0 and 5-0 on 4 separate occasions with nearly 1/3rd of the season left to go.