The most expensive shot-stopper in world football was acquired for £72 million ($92m) to become a long-term number one at Stamford Bridge.
He filled that role initially, although questions have been asked of the Spaniard’s ability and character from the moment he arrived in west London.
Frank Lampard took to dropping him at times in 2019-20 and moved to snap up Edouard Mendy when the opportunity to spend again presented itself over the summer.
He has been forced back to Kepa at times, with the 26-year-old figuring again in the Blues’ last Premier League outing.
Kepa contributed to another frustrating afternoon for Chelsea, as he failed to keep out Che Adams against the Saints, and Cascarino sees him tumbling down the pecking order as a result.
The former Blues striker told talkSPORT: “He’s gone from number one to number two goalkeeper, and after [the Southampton] performance he’s probably number three now.
“He won’t even make the bench now as [Willy] Caballero will be number two.
“I’m a bit surprised [Lampard] chose to play Kepa; he doesn’t fancy Kepa and it’s obvious.
“Caballero has done very little wrong, but because they’ve paid such a high fee for a player they need to justify playing him to give him an opportunity to perform.”
Argentine keeper Caballero filled in for Kepa when changes were made between the sticks last season.
He has shown himself to be a reliable back-up option, but is now 39 years of age and unlikely to see regular game time for a club of Chelsea’s ambition.
Mendy is the man to step in and provide a solution to what has become a problematic position for the Blues.
He is currently nursing a slight knock, though, with Lampard telling reporters on the back of stalemate with the Saints: “Mendy is at the minute injured and probably will be fit in the next week or two weeks and then that will be the decision for me to make about who plays.”