def is_valid_position(position: str) -> bool:
    """Filters out players without a valid position.

    Args:
        position (str): Player's current position

    Returns:
        bool: True if the player has a valid position, False otherwise
    """
    valid_position_values = ["TE", "RB", "WR", "QB"]
    if position not in valid_position_values:
        return False
    else:
        return True