Answering my own question, from an article in 2022 after a title win:
MISERLY DEFENCE
No side has scored more than two goals against Celtic in any one league game this term. Aside from the
20 clean sheets, there have been 14 single-goal efforts against the Hoops and only four two-goal games by the opposition. Even then, of those four games, the Celts still won three of them - Dundee 4-2, Aberdeen 3-2 and Dundee again 3-2, with the 2-1 defeat at Tynecastle in the opening game being the only negative.
Only 22 goals were scored against the Celts in the 38 games and a goal difference of 70 was attained to Rangers’ 49.
Comparing his record at Celtic with his current employment:
|  | 10 June 2021 | 6 June 2023 | 113 | 83 | 12 | 18 | 73.45 | |
|  | 6 June 2023 | Present | 62 | 32 | 10 | 20 | 51.61 | |
| | | | | | | | | |
---|