"I've doubted all my life. I feel like that's what started the dog mentality. My mentality when I'm out there on the field is to kill," via Byron Murphy, #Seahawks. [Edwin Hooper/Seattle Seahawks] More photos here: seahawks.com/photos/photos-12-frames-from-offseason-workouts-seahawks-hit-the-field-for-a-tuesday-workout-x7938#17dc75e4-7427-421f-87fa-01ed96ed31c9 #Seahawks #Seattle #Seahawksnation #12s #12thman #gohawks