The Blues have been famous for firing many managers under the Russian owner since 2003-2004.
But among all those managers, Lampard has the lowest win percentage of 49.
It is close to that of the season where Andre Villas-Boas and Roberto Di Matteo managed the club, which was 51 percent.
The only time the Blues had a worse run was the season Jose Mourinho got the boot in 2015-2016.
While Chelsea are still fourth in the Premier League, it is mostly due to their rivals' faults.
And the 3-0 home loss to Bayern Munich has exposed their lack of quality.
Lampard will hope that Champions League qualification gets him to the summer, when he can improve the team through transfers.