13/14 season - conceded 37 - second best defensive record in the league that season (only Chelsea better)
14/15 season - conceded 38 - fifth best defensive record in the league (Chelsea, Arsenal, United, and Saints better)
15/16 season - currently 34 conceded - currently the joint 4th best defensive record in the league (Leicester, Spurs, United (who have played a game less are better - Arsenal are tied).
Over the past 3 seasons only one team - Chelsea has conceded less goals than Pelligrinis City team
109 conceded in 3 seasons by Pelligrinis City team
Chelsea - 105 (1 game less played)
United - 110 (1 game less played)
Arsenal - 111
Liverpool - 143 (1 game less played)
Everton - 137 (1 game less played)
Spurs - 130
His Real Madrid team cocneded 35 goals - second best in the league that season
Mourinho took over cocneded 33, 32 and 42 (average of 36 per season) in his 3 years in charge - second each season like Pelligrini was to Barcalonas defenseive record.
At Villareal
04/05 - 37 conceded - 4th best in the league
05/06 - 39 conceded - 5th best in the league
06/07 - 44 conceded - 8th best in the league
07/08 - 40 conceded - 2nd best in the league
08/09 - 54 conceded - 8th best in the league
Malaga
10/12 - 68 conceded - 19th best in the league - note on this he took over the team part way through the season with them having already conceded 21 in 9 games - so his record in charge was 47 conceded in the remaining 29 games - a significant improvement over what they had been scheduled to cocnede that season with the old manager (a quarter of the season having been played they where on pace to cocnede roughly 89 goals that season)
11/12 - 53 conceded - 11th best in the league
12/13 - 50 conceded - 5th best in the league
Finished conceding 38 or less in 6 out of `12 seasons managing in Europe, finished with the 5th or better defense in the league in 8 out of his 12 seasons.
One thing that cant be said is his teams are 'poor' defensively
Now on the other hand if we look at goals scored - City have topped the league all 3 season he has been in charge
Real Madrid broke their club record of goals scored the 1 season he managed them
To me that strikes me as a manager who has the perfect blend of attack/defesne and doesn't leave his team wide open to play attractive football...