Fernando Torres could be on way out
"I went through the hardest moments of my career. I went several games without being in the starting lineup and I've never been in that situation before.
"The only thing that gave me hope was the support of the people."
Torres, first-choice striker for the European champions this season following the sale of Didier Drogba, has scored 14 goals in all competitions this term but has still to prove he is worthy of a regular place in the Chelsea team.
Former Chelsea and Netherlands striker Jimmy Floyd Hasselbaink said recently that the Spaniard did not score vital goals.
Hasselbaink suggested many of the goals Torres had bagged this season had come when the game was already out of reach for Chelsea's opponents and that he failed to get enough match-winning efforts in close-fought matches.
Cascarino, who won 88 caps for Ireland and played for Chelsea between 1992-94, said the writing could now be on the wall for Torres.
"If you are playing for a big club you have to deliver because if you don't, you'll be going through the exit door," added Cascarino.
"He is very close now. The fans singing Demba Ba's name is going to hurt Torres but you are going to get that if you don't play well and you miss chances.
"The fans won't accept it if you are not performing."