Aldo Leao Ramírez Sierra (born 18 April 1981) is a Colombian footballer. He also holds Mexican citizenship.

Ramírez made his debut with Santa Fe of his home country of Colombia and also played for Atlético Nacional where he helped the team capture back-to-back league titles. In 2008 Leão moved to Mexican club Monarcas Morelia, the club where he has spent for the majority of his career. Ramírez has helped Morelia win the 2010 North American SuperLiga and the Apertura 2013 Copa MX. After the departure of goalkeeper Federico Vilar before the Clausura 2014 season, Ramírez was named captain of Morelia by then manager Carlos Bustos.

Ramírez has represented Colombia both at youth and senior level. Ramírez made his debut for the Colombia national team in 2002 in a friendly against Honduras. Ramírez first goal for Colombia came in a 3–2 loss against England in 2005.

Club career

Santa Fe

Beginning years Ramírez was part of Atlético Nacional's youth academy, and made his professional debut with Bogota-based club Independiente Santa Fe in 1999. In his first year as a professional, Santa Fe reached the final of the 1999 Copa Merconorte where they faced América de Cali. At age 18, Ramírez played the full 90 minutes of the first leg while he started the second leg but was substituted at half time by David Hernandez. Santa Fe would end up losing the final 5–3 on penalty kicks.

The following year, Ramírez helped Santa Fe finish second in the 2000 season with 74 points; he appeared in 36 games and scored three goals. In the 2001 season, he helped Santa Fe end seventh as he scored three goals in 35 appearances. In 2002, the Colombian league changed its format into two short tournaments, Apertura and Finalizacion. In the 2002 Apertura, Santa Fe finished second in the table, but in the Finalizacion, the club failed to make the playoffs.

The following years for Santa Fe were mediocre, with the club failing to qualify for the playoffs in both tournaments for 2003 and 2004, although Ramirez played many games in the 2004 season and scored eight goals.

Last season in Santa Fe In the Apertura 2005 season, Ramírez helped Santa Fe qualify for the playoffs for the first time since the Apertura 2002 season, with a second-place finish. Santa Fe won Group B of the semifinals with 12 points and advanced to the league final against Atlético Nacional. Ramírez played the full 90 minutes in the first leg as the teams drew 0–0 at Santa Fe's Estadio El Campín. In the second leg, with the score still tied at 0–0, Ramírez was substituted out with fifteen minutes left to go, but Nacional scored twice in ten minutes to win the finals 2–0 on aggregate.

Atlético Nacional

Early club struggles During the off-season, Ramírez moved to Atlético Nacional, the club who defeated Santa Fe in the league final just the previous season and the club where Ramírez spent his youth years. Ramírez first season at his new club did not go very well as Atlético Nacional ended in eleventh place and missed out of the semifinal stage, three spots lower than his former club Santa Fe who did qualify to the semifinals stage. Injuries in 2006 limited Ramírez to appear in 21 matches in both seasons' tournaments (Apertura and Finalización) as Nacional ended both seasons in the top eight but did not win their respective groups in the semifinals stage. Also in 2006, Ramírez made his Copa Libertadores debut in a 3–2 loss against Palmeiras, being substituted by Héctor Hurtado in the 81st minute.

Back-to-back titles To start out the 2007 Apertura season Atlético Nacional were undefeated in the first five games; Ramírez started the first two matches as Nacional won both but was relegated to the bench for the following three. Ramírez returned to the starting line up in the sixth match against Deportivo Cali where Nacional lost 2–0. His first goal of the season came in a 2–2 draw in El Clásico Paisa in week nine. Nacional ended in third place as Ramírez appeared in the majority of the matches that season either as a substitute or a starter. Ramírez appeared in every playoff match of Nacional's title-winning campaign, helping the cliub win its ninth title with a 2–1 victory against Atlético Huila in Medellin.

Ramírez debuted in the 2007 Torneo Finalización in the second match as he helped his team defeat Santa Fe 2–0. Nacional would end up in first place with 38 points with Ramírez being constantly in the starting eleven.

In the first match of the semifinal group stage, Nacional defeated Once Caldas 1–0, and Ramírez was sent off in the 91st minute after an argument with an official. After returning from suspension, Ramírez started the match against rivals América de Cali where Nacional lost 2–1. Nacional advanced to their second straight final after a 0–0 draw with Once Caldas in the last matchday, combined with América's draw with Cúcuta Deportivo, who needed a victory to advance to the finals. In the finals, Nacional faced La Equidad, and Ramírez played the full 90 minutes in both legs as Nacional won their second straight title 3–0 on aggregate. Once again Ramírez was considered as one of the most important players from Nacional's title run, finishing the entire 2007 season making 46 appearances and scoring 9 goals.

Morelia

First seasons in Morelia On 20 December 2007 it was announced Ramírez was transferred to Mexican club Monarcas Morelia, one day after winning the Torneo Finalización with Nacional. Ramírez made his debut for Morelia at Robertson Stadium in Houston, Texas in a 1–0 loss against Club América at the 2008 InterLiga tournament. On 26 January 2008, Ramírez scored his first two goals for the club as Morelia defeated Pachuca 3–2. After a promising start of the season, Morelia only managed to win three of the last 15 matches; with Ramírez appearing in 16 out of 17 matches.

Ramírez started out the Apertura 2008 season with a goal in a 2–2 away draw against San Luis. Morelia would end up with 25 points but did not qualify to the Liguilla. Ramírez appeared in 14 matches which he started most of them.

Return to Colombia After two short tournaments in Morelia, Ramírez was loaned to his former club Atlético Nacional for six months, with no option to buy. La Equidad spoiled his return to Nacional with a 1–0 victory, with Ramirez playing the full match.

Ramírez appeared and started in 15 of 18 matches and scored a goal against Deportivo Pasto as Nacional ended in 17th place with 16 points. After the season Morelia rejected Nacional's offer to extend Ramírez loan after Morelia manager Tomás Boy expressed his desire for Ramírez to return to the club.

Return to Morelia Ramírez made his Apertura 2009 season debut in a 1–1 draw against Santos Laguna, scoring the first goal of the game in the 18th minute. Ramírez would help Morelia end up in third place with 33 points in the classification phase which helped Morelia qualify to the liguilla and the 2010 Copa Libertadores. In the quarterfinals of the liguilla Morelia faced Santos Laguna, who Morelia defeated 4–2 on aggregate; Ramírez appeared as a substitute in the first leg and started the second leg where he assisted Mauricio Martín Romero on the third goal. Morelia faced Cruz Azul in the semifinals where Ramírez appeared in both legs as Cruz Azul defeated Morelia 2–1 on aggregate to advance to the league final against Monterrey.

Ramírez started the Bicentenario season playing nine of the first 10 matches, missing one due to getting sent off against San Luis in the third match. Ramírez missed five games due to an injury, returning to action in a 2–0 away loss to UNAM. Morelia qualified to the liguilla for the second straight season after ending the season seventh with 25 points. Morelia faced Guadalajara in the quarterfinals and defeated them 5–2 on aggregate, with Ramírez starting in both legs as Morelia advanced to the semifinals for the second straight season. In the semifinals against Santos Laguna, Ramirez played both legs as Morelia was eliminated 10–4 on aggregate. Ramírez finished the season with 37 appearances including two Copa Libertadores matches.

2010–11 Ramírez missed most of the Apertura 2010 season due to health problems, one was due to Orchitis which he was scheduled to be out 15 to 21 days. Orchitis prevented him to play the 2010 North American SuperLiga final against New England Revolution which Morelia won. He returned to action on 12 September, coming in for Ismael Pineda in the 55th minute in a 2–0 home loss to Club América. Ramírez missed 9 matches right after that due to a sports hernia. Ramírez returned to action in the 16th week in 1–0 away win over UANL, coming in the 63rd minute for Luis Gabriel Rey. Ramírez finished the Apertura 2010 season by coming on as a substitute in a 3–3 draw against Puebla. He replaced Luis Gabriel Rey at halftime but was sent off just seven minutes later, along with Puebla's Felipe Ayala, after the two exchanged punches. Morelia failed to qualify for the liguilla, finishing 12th with 21 points..

Due to his red card against Puebla in the last match of the season, Ramírez missed the Clausura 2011 opener against Club Atlas. Morelia lost the match 5–0 to an Atlas team who was fighting to stay in the first division and who would end up 10th that season. After sitting out the humiliating loss against Atlas, Ramírez returned in Morelia's home opener against Guadalajara which ended in a 1–1 draw. After playing three straight full matches, Ramírez was sent off in the fifth week match at Club Necaxa after a hard foul on Everaldo Barbosa, it was his second yellow card in 12 minutes. Ramírez returned in an away 2–1 win over Club América, assisting Rafael Márquez Lugo in the first goal just 40 seconds into the match. Two weeks later Ramírez scored his first goal of the season in a 6–1 away blowout win over Toluca. It was Morelia's fourth straight win as the team extended their unbeaten streak to eight matches, their only loss was the 5–0 opening loss to Atlas. Morelia's eight-game unbeaten streak came to an end when they fell to league leaders UNAM 1–0 at home, a team who Morelia would end up facing again that season. With Ramírez being a crucial part of the midfield Morelia ended the season with 31 points and ended third place in the classification table and second in their group.

Ramírez and Morelia faced Club América in the quarterfinals and eliminated them 5–3 on aggregate. In the semifinals against Cruz Azul, Ramírez and Morelia would make a comeback in the second leg, winning 3–0 after losing the first leg 2–0 and advancing to their first league final since 2003. The victory was overshadowed when a fan ran out on the field after the third goal and caused a brawl between the players and coaches from both clubs.

Morelia faced UNAM in the league final at Estadio Morelos, Ramírez performance was praised by various media outlets. Morelia and UNAM would end drawing 1–1 in the first leg in Morelia. In the second leg at the Estadio Olímpico Universitario, Ramírez helped Morelia draw a penalty when Miguel Sabah was tripped by Alejandro Palacios inside the penalty box after an intended pass by Ramírez. After it looked like it was going to extra time, with the scores still tied at 1-1, Javier Cortés scored the title clinching goal for Pumas UNAM.

2011–12