Following a tortuous time with injury, there were 719 days between his first and second appearance for Glasgow but after returning to action in November, the back-row is now a part of Scotland's Six Nations preparations.
Wales coach Warren Gatland recalls experienced players and adds fresh talent for the 2025 Six Nations but has left out the likes of Cameron Winnett and Max Llewellyn who have been performing well at club level.
The irresistible form of back-rower Tom Willis, alongside the versatility and quality of Ben Earl, might give Borthwick pause for thought ahead of the Six Nations - but Saracens are demonstrating the solution.