text: Niners LB Peterson Tears Achilles' Tendon  SAN FRANCISCO (Sports Network) - San Francisco linebacker  Julian Peterson left Sunday's game against Arizona late in the  first quarter with a torn left Achilles' tendon.
inputs: Niners LB Peterson Tears Achilles' Tendon  SAN FRANCISCO (Sports Network) - San Francisco linebacker  Julian Peterson left Sunday's game against Arizona late in the  first quarter with a torn left Achilles' tendon.