SM
Over the last 12 months Piero Maza has refereed 15 games, comprising 5 Copa Sudamericana games, 5 Copa Libertadores games, 2 World Cup Qualifying - South America games, 2 Under-20s World Cup games and 1 Saudi Pro League game. In addition he has been the Fourth Official 8 times.
During this period he has issued 0 yellow card at a rate of 0 per game and 0 red card at a rate of 0 per game.
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