The 2009 season became a decisive year for Atlético San Luis, a club that had faced ups and downs in recent years. After experiencing a tumultuous relegation in 2007, the management decided to implement significant changes in the team's structure, aiming to rejuvenate the squad and give a new boost to the fanbase.

Under the guidance of a new coaching staff, the team brought in a series of promising players who not only added talent but also a winning mentality. The arrival of figures like midfielder Hugo Rodríguez and forward Francisco "Kikín" Fonseca, who already had experience in the top tier, injected a dose of optimism among the supporters.

The first half of the tournament was marked by a more offensive and dynamic style of play, something that the Potosino fans had been eagerly awaiting. Atlético San Luis showcased an attractive playing style, combining youth with experience, and this translated into a series of positive results that kept them in the hunt for the top spots in the table.

One of the standout moments of that season was the match against Club León, one of their main rivals. The atmosphere at Estadio Alfonso Lastras was charged with tension and excitement, and Los Tuneros managed to capitalize on their home advantage to secure a victory that not only earned them three points but also lifted the spirit of the team and the fans.

As the tournament progressed, Atlético San Luis solidified its position as one of the most competitive teams in the Ascenso League, reaching the final phase. Although they did not achieve promotion this time, the 2009 season laid the groundwork for the club's future, demonstrating that with a mix of talent, strategy, and passion, Los Tuneros could compete at the highest level.

The season concluded with a sense of hope and a renewed focus on the future. The fans, revitalized, began to dream once again of a return to the Primera División, and the management, satisfied with the changes made, continued to invest in the team's development. Thus, 2009 became a key year, marking the start of a new era for Atlético San Luis.