Richardson was back on his feet after a minute, but Rowe stayed down with both teams' physios attending to him.
Rowe was eventually carried off on a stretcher in the 25th minute and was replaced by Neil Roberts.
Manager Brian Little said that he felt sorry for the 26-year-old, who has found chances hard to come by this season.
"I'm not quite sure what the diagnosis will be but it seems as though he could have broken his jaw and the neck brace was there to give him support.
"His face was very bloated and it really is sad for him because every time he's started for us this season he's had to come off injured.
"I do feel for him and it looks as though he will be missing for a while which is a big blow for us."
Dudfield didn't even make the bench today, but Little says that there is no rift and that the former Leicester forward just needs "a few days away from the pressure and expectation that surrounds him."
"We decided that Lawrie needed a rest and had a good chat with him earlier in the week.
"Rodney Rowe has looked sharp over the past fortnight or so and we just felt that it would do Lawrie some good to sit out and watch a couple of games. He understood that and accepted the decision."