Tiger Woods remains confident he can discover the kind of form to challenge with the best players in the world, but his second-round display at the PGA Championship has convinced some fans that is no longer possible. The 48-year-old made history by making his 24th consecutive cut at Augusta last month. It was the first time in two years that Woods played 72 holes, but it proved to be a weekend to forget for the 15-time major champion as he carded a round of 82 on the Saturday. Woods came into Valhalla Golf Club with optimism of improving and showed promising signs on Thursday. A disappointing …