The "Manny Clause" is challenged

Remember that "Manny Clause" I discussed the other day? Well, it appears the lawyers for the MLBPA are now on the case:

The MLB Players' Association has filed a grievance on behalf of players who have a provision in their contracts under which they agree to make a donation through his club to a charitable organization, MLBPA chief operating officer Gene Orza told ESPN's Karl Ravech.
[...]
[Dodgers owner Frank] McCourt sounded surprised by the union's litigation.

"I have not seen the grievance, but I find it odd that in these challenging times, that we encounter a complaint against the idea of players giving back to the communities that support them," he said in a statement. "We believe there are qualities that represent the Dodger way. The player's contributions to the team, appreciation of the fans, and impact on such a supportive community all combine to help our organization live up to our core values. We seek players who embrace these values. The Ramirez provision is a blank line to be filled in with whatever number a player chooses."