June 20 (Reuters) - American Charley Hoffman kick-started his bid for redemption at the Travelers Championship with a stunning nine-under-par 61 for a one-shot lead after Thursday's opening round in Connecticut. Hoffman, looking to atone for last year's collapse when he squandered a two-shot lead with two holes to play, turned a steady start of five straight pars into a sensational round, carding five birdies and two eagles over the final 13 holes. Compatriot Hunter Mahan, fresh off a share of fourth place at the U.S. ... More...