What's more, Marseille are now the most ill-disciplined team in Ligue 1 with their 2.94 card per game average, while PSG are picking up two cards per 90 minutes.
With Neymar still missing, it was not a vintage performance from PSG on a freezing Parisian night in an empty stadium - supporters are still barred from games in France with a nighttime curfew in place nationwide as part of the fight against coronavirus.
Of his first game back at the Parc des Princes, he added: "It was very emotional".
The former Tottenham Hotspur manager will have been pleased by his side's display following a disappointing 1-1 draw at St Etienne on Wednesday in the Argentine's first game in charge since replacing Thomas Tuchel.
Pochettino again started playmaker Marco Verratti in an advanced role behind central striker Kean, with the latter opening the scoring in the 16th minute.
Keylor Navas pulled off a theatrical save to keep out Romain Faivre's curler and PSG was in front soon after thanks to Kean, who helped the ball over the line from a yard out after Marquinhos's header hit the inside of the post and landed in his path.
Argentina forward Mauro Icardi doubled the lead before Spain midfielder Pablo Sarabia scored from 20 yards.
Paris can still take the honorary title of "autumn champions", if they beat Brest and Lyon lose at Rennes.
Nevertheless Pochettino, who played for PSG, called it a "special match, but winning the game nearly matters more than winning a trophy at the end of it".
There were also wins for Bordeaux, Reims and Strasbourg.