The 40-40 club in baseball is a group of batters who have collected 40 home runs and 40 stolen bases in a single season in Major League Baseball (MLB) . This combination of power and speed is rare, and only five players have reached the 40-40 club in MLB history, with none having done so more than once. The five players who have achieved this feat are Jose Canseco, Barry Bonds, Alex Rodriguez, Alfonso Soriano, and Ronald Acuña Jr. . Becoming a member of the 40-40 club is an elusive achievement in modern American baseball, as very few players possess both the power to hit 40 home runs and the speed to steal 40 bases in a season.