Thomas Bjorn leads PGA Championship at PGA Championship . Veteran Thomas Bjorn goes on birdie spree on back five again . ( CNN ) -- Luke Donald one shots adrift in second place . World number one Thomas Bjorn challenging at Colonial on PGA Tour .
Thomas Bjorn leads PGA Championship at PGA Championship . Veteran Thomas Bjorn goes on birdie spree on back five again . Luke Donald one shots adrift in second place . World number one Thomas Bjorn challenging at Colonial on PGA Tour .