NEW YORK, N.Y. - The union representing NFL on-field officials criticized the league Thursday for inconsistencies in grading calls, including two high-profile penalties from recent games.In a release, the NFL Referees Association says the NFL has caused confusion for NFL officials as to what the league does and doesnt want called.The union referred to penalties on Washingtons Chris Baker for a hit on Eagles quarterback Nick Foles on Sept. 21, and to Chiefs safety Husain Abdullah last Monday night for going to his knees to celebrate an interception return for a touchdown. Abdullah actually had gone to his knees to pray a€” an act exempted from celebration penalties.The union says both calls were graded as correct even after NFL executives announced that they were incorrect. Baker got a 15-yard penalty and was ejected from the game at Philadelphia. Abdullah also received a 15-yard penalty.Consistency in penalty enforcement is extremely important to the players, coaches and fans. Uncertainty as to what the league wants called is not a road you want to go down, said Jim Quirk, executive director of the NFLRA.Quirk noted that Baker was penalized for a blindside block on Foles as a personal foul; a brawl followed near the Washington sideline and Eagles tackle Jason Peters was also ejected.Two days later, Troy Vincent, the NFLs executive vice-president of football operations, said the hit was legal and should not have been penalized. Yet, the NFLRA said, the leagues officiating department a day later graded the call as correct.In the case of the block on Nick Foles, by rule, it was not a foul because the quarterback was pursuing the play, the contact was not to the head or neck area, and the play was not over, NFL spokesman Michael Signora said in an email to The Associated Press. However, the referee a€” watching the play at full speed and without the benefit of a replay review a€” judged that the block was late and threw a flag. While not a correct call, we understand why it was made.In the case of Abdullah, a devout Muslim who took off a year from football to go on a pilgrimage to Mecca, the league said Tuesday that the penalty was in error.The leagues rule book prohibits players from celebrating while on the ground, but spokesman Michael Signora wrote in an email Tuesday that the officiating mechanic in this situation is not to flag a player who goes to the ground as part of religious expression, and as a result, there should have been no penalty on the play.But, according to the union, officials who made the call were given correct grades by the officiating department on Thursday. That could be because Abdullah could have been penalized for sliding on his knees before actually praying.But the league reiterated Thursday what it announced earlier this week, that the call was incorrect and not graded otherwise.As part of evaluating the performance of our game officials, the officiating supervisors recognize that for an incorrect call on a close judgment play, the official may have used appropriate reasoning, Signora said. On such a call, the official is not downgraded.Regardless, said former NFLRA President Scott Green, a recently retired referee, theres a communications problem between the NFL and its game officials.It seems there is a disconnect between what the officiating department expects from officials and the public statements being made by league executives, Green said. 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