The NFL Player's Association conducted a survey and claimed three-quarters of its members don't trust its team medical staffs.

San Francisco 49ers owner John York, who is also chairman of an NFL player health and safety committee, said he has to see it to believe it.

At the NFL owner's meeting on Tuesday, York said, "I don't know what the questions were. I have no idea how many players were asked or what the responses were." 

The union reportedly released the study during Super Bowl week in February and found that those who responded to the survey aren't satisfied with how their teams manage injuries, according to The Associated Press. The union stressed that it wants more independent physicians involved with diagnosing and treating players, which York claimed is already happening.

"We have nine medical advisory committees and then we have a number of other committees that don't have anything to do with anybody within the NFL," York said, adding that they are all outside experts."

York added that many of the players on his team - including their families, staff and coaches - use the 49ers physicians, which he said is a good indication that the players are happy with the physicians.

The union said in a statement regarding York's comments, "Coming from the organization that denied Joe Montana workers compensation benefits for years, we are not concerned about the remarks about our player survey."

"The day the NFL commits itself to taking care of players who have been injured at work is the day we begin to take these types of comments seriously," the union added.

Tags: San Francisco 49ers owner John York NFL. medical survey