Argentina international prop Matias Diaz has arrived at Championship leaders Bristol on a two-month trial.
The 21-year-old tight-head left New Zealand-based Super Rugby side the Highlanders in August after playing eight times in his sole season there.
Diaz has won eight caps for the Pumas since making his debut 18 months ago.
"He has plenty of potential and now has an opportunity to impress. After there's a gap in the squad," said boss Andy Robinson.