(Reuters) - Tiger Woods is toiling diligently to improve his short game but there is still no timetable for his return, the former number one said on his website on Friday. Woods, sidelined from competition since August due to back surgeries, revealed that he has been hard at work on his chipping and putting at his outdoor facility and taking full swings on his golf simulator. "Health wise, I continue to improve," Woods' wrote on the site. More...