Héctor Cuellar was born on 16 August 2000 in Bolivia and came through as a defensive midfielder capable of also helping in the back line. His development was shaped by the domestic league's need for midfielders who can win duels, protect centre-backs and cope with long spells of transition football.
Cuellar built his club profile with Always Ready, one of Bolivia's most ambitious clubs in the early 2020s. There he learned to play in a team expected to dominate many domestic opponents while also needing a more compact, defensive personality in continental matches.
As of May 2026 he is listed with Club Always Ready. Staying in that environment has given him regular responsibility and kept him visible to the national-team staff, especially because Bolivia's midfield often needs a ball-winner behind more creative players.
For Bolivia he has been involved across World Cup qualifying and Copa América cycles, frequently as a squad midfielder who can be used when the game calls for more bite. His role became more relevant as the national team tried to protect younger full-backs and give attacking midfielders freedom in the 2026 qualification period.
Around 1.76 m and right-footed, Cuellar is a defensive midfielder defined by tackling, coverage and positional seriousness. He is not a spectacular creator, but his function resembles a Bolivian version of Guido Rodríguez: screening spaces, keeping distances short and allowing the players ahead of him to take more risks.