2009–10 Rugby Pro D2 season  The 2009–10 Rugby Pro D2 was the second-level French rugby union club competition, behind the Top 14, for the 2009–10 season. It ran alongside the 2009–10 Top 14 competition; both competitions were operated by the Ligue Nationale de Rugby (LNR). Dax and Mont-de-Marsan, the two major clubs from the Landes "département", got relegated at the end of the previous Top 14 season and replaced Racing Métro and Albi, who gained promotion to the Top 14. This season also welcomed Lannemezan and Aix-en-Provence, respectively Fédérale 1 champions and runners-up, who took the place of Bourg-en-Bresse and Béziers, the previous year's two bottom finishers. Agen, who had been a favorite for promotion ever since they were relegated at the end of the 2006–07 season, finally lived up to the expectations and dominated the championship from the start, finishing with an 11-point margin over second-placed Lyon and thus earning promotion to the 2010–11 Top 14 season. Lyon and La Rochelle made the most of the home ground advantage to qualify for the promotion final with victories over Pau and Oyonnax, respectively, and faced each other in the final. La Rochelle, despite having lost both confrontations against Lyon during the regular season, triumphed 32–26 and earned the right to accompany Agen in the Top 14 after eight years spent in Pro D2. The two newly promoted teams, Aix-en-Provence and Lannemezan, were not able to rival the other teams and from early on in the season occupied the bottom two places that they kept until the end. Lannemezan in particular finished with three wins out of thirty games (one of which was against arch-rivals Tarbes), amounting to 19 points, the poorest record in the Pro D2 since the introduction of the bonus points. However, in a new twist of events, Montauban, who were already relegated to Pro D2 for financial reasons (thus saving Bayonne's spot in the Top 14), failed their audit on June 10, and were further relegated to Fédérale 1. Their decision not to appeal the DNACG's ruling also meant that Aix would be reprieved and compete again in Pro D2 for the next year. At the end of the previous season, Racing Métro were champions and thus automatically promoted to Top 14.