Barnsley boss Mark Robins was left disappointed with the overall performance of the match officials as his side lost 2-0 at Hull.
Matt Fryatt got the Tigers' 66th-minute opener from the penalty spot on his home league debut after the referee adjudged the striker's shirt had been pulled in the box by Stephen Foster, who was shown a straight card. The Tykes' Jason Shackell was then also dismissed for a second booking by official Peter Quinn, before Robert Koren netted in injury time to secure the win for the Tigers.
Robins said: "He (Quinn) was a first-time Championship referee and there were one or two things that weren't given for both sides.
"The linesman gave the penalty, but if that was a penalty maybe there could have been six or seven in the game. The penalty was definitely the turning point in the match.
"It just looked like Stephen Foster stepped the wrong side and there was a bit of holding, but it looked like a 50-50 challenge that went the opposition's way.
"With Jason Shackell's sending off in the corner, it was a really strong tackle. But 30 seconds or so before that there was a tackle from [Nolberto] Solano that was just as bad, and it was overlooked. It is disappointing for us because not only have we lost this game, we have now lost both defenders - two centre halves who have played every minute of every game this season."