@Entity
@Table(name = "MYT_Team")
public class Team extends Named implements Serializable {

 ...
 @OneToMany(mappedBy = "team", cascade = CascadeType.ALL, fetch = FetchType.EAGER,  targetEntity = Player.class)
 private Set<Player> players = new HashSet<Player>();
 ...
}

@Entity
@Table(name = "MYT_Player")
public class Player extends Human {
 ...
 @ManyToOne(fetch = FetchType.EAGER)
 private Team team;
 ...
}