McDermott was given a two-match ban for punching during Barrow’s fixture against York City Knight and received a further four-match ban for stamping in the same game.
Schofield said: “We were OK at Rochdale, but the conditions and the heavy pitch didn’t help. Our discipline was good and we scored some attractive tries but we need to be more consistent.”
Sunday’s clash sees Schofield come head-to-head with former Great Britain team-mate Daryl Powell.
Schofield added: “Daryl’s turned Featherstone around and he was very unlucky not to win last year’s Co-operative Championship Grand Final.
“Rovers play very good, attacking Rugby League and it will show us how good we are. If anybody’s not watching Super League this weekend then they should come to Craven Park because they’ll see a great game.”
Featherstone Rovers are expected to field a similar team to the one that beat York last week.
Powell said: “We struggled a little bit to break York down and there were areas of our game we need to highlight and improve.”