Ruben Sierra has kept a busy stable recently with 0 runners over the last 7 days. Recent runners have not yet managed to secure a victory. The stable's overall strike rate sits at 0%. The stable's runners averaged betting odds of 22.00. The level of competition reached official ratings of 78. Mia Nicholls has been the stable's most frequently used jockey recently. There were also several higher-priced runners representing the stable.