Early Saturday morning, a golden retriever named Jake made history when he jumped from a boat near Alcatraz into the choppy bay and swam 1.2 miles to the San Francisco shoreline. He was the only dog among more than 500 swimmers who took part in the South End Rowing Club's 10th annual Alcatraz Invitational. Dog-paddling his way toward the front of the pack, Jake came in 72nd overall, leaving some serious swimmers seriously chagrined. His time was 41 minutes and 45 seconds. Reaching the shoreline next to the Hyde Street Pier to chants of "Jake! Jake! Jake!" the 4-year-old canine...