If were the coach I would look at cutting the whiners. If they do not want to practice hard then they probably do not want to play hard.
Reading the Raiders board I frequent about this topic, a few posters seem to believe that it’s entirely possible some slack ass on the roster ran to the player’s union to complain. Others have blamed the drive-by media in the Bay Area because they were the ones that found this out initially.
At any rate, if it were up to me, I would make it a point that anyone that did whine about it to send their resumes to In N Out burger by the close of business on Monday.