He left school at sixteen and began his rugby career with his hometown club Stirling County, making his senior debut at 17.
[1][failed verification] Logan played for the amateur provincial side Glasgow District.
Whilst at Wasps he helped them win the Anglo-Welsh Cup in 1999 and 2000; he was a replacement in the 1999 final but started and scored a try and a conversion in 2000.
[8] Logan dated newsreader Kirsty Young and moved to London,[9] before the couple separated in 1999 after three years.
[11][12] After undergoing IVF treatment, the couple welcomed twins, a son (Reuben), and a daughter, who were born on 28 July 2005.
In August 2014, Logan was one of 200 public figures who were signatories to a letter to The Guardian expressing their hope that Scotland would vote to remain part of the United Kingdom in September's referendum on that issue.
[17] In 2022, Logan, at his wife's suggestion, had a Well Man health check that unexpectedly revealed he was in the very early stages of prostate cancer and the medical diagnosis recommendation was to remove his entire prostate to prevent the further spread of cancer.