The golfer who is listed at No. 13 on Guyism.com's "50 hottest female athletes on social media" ranking is Sophie Horn.
On her website (sophiehorn.com), Horn labels herself a "golfer, model, presenter." She won some amateur golf tournaments as a junior in Britain, but started to gain more widespread notice after becoming a columnist and model for the magazine Golf Punk around 2005. Since then, Sophie has become an in-demand model (often with a golf theme, often with a lingerie theme), has written for GQ magazine, and hosted numerous television programs about golf in the UK. She's also launched her own line of golf belts.
You can follow Sophie on Twitter.