Bruce Irvin apologized and claimed "full responsibility" for incurring a four-game NFL suspension, announcing he would not appeal the punishment.The second-year Seattle Seahawks defensive end did not ask for sympathy, and he's not getting any from San Francisco 49ers safety Craig Dahl."I have no sympathy for violators of NFL drug test," reads a tweet from Dahl's verified Twitter account. "It's easy to know what goes in your body. If this was another sport what would happen?