In the volleyball of great performance, the statistical analysis of the game actions during the official or friendly matches nowadays, has become a regular and absolutely necessary practice. The purpose of this study is to analyse the game actions during the official matches of the Middle-Blocker and also, in improving his performances within the team, using the statistical analysis of the Data Volley software. The Data Volley programme of statistical analysis is a software used internationally by all the top teams and more, being used with great success also in the National Championship of volleyball in Romania. One of the main game positions in the volleyball is that of the Middle-Blocker, who has a very important role inside the team as a whole, first as concerns the anticipation of the attack from the other team and the active participation in the offensive actions of his team. This thing highlights the strategic positioning of this player in the field and the fact that blocking is one of his main responsibilities, that is playing in the defence. Analysing minutely, both by video, and by statistics, each game action of the Middle-Blocker player, as well as his activity within the sports training sessions, we noticed that we can improve his contribution from a tactical point of view within his team, during the official matches. The purpose of this study is to improve the individual sportive performances of the Middle Blocker, as well as those within the team.