Riddonkulous

Beneath one stadium, I am a mascot. Beneath another field, I am a resident. In one hand, I prepare a blade. In another, I test a person's patience. Some know me by my stripes. Others know me by my persistence. One of my kin became famous For seeming not to care at all. Left alone, I prefer the earth. Disturbed, I become my own verb. What am I?