Not sure I'd agree that was the situation with those two managers so much as they were aware someone was available that they felt fitted the profile better. I can also see them introducing somebody in without moving Martinez on.I really don't want him anywhere near the squad come August. But, if he wins the cup, I can't see him losing his job.
If we win it, I see the scenario being like Chelsea with Di Matteo or Rodgers after last season. He will keep his job but with the challenge of vastly improving the league form. If he fails to turn the league form around by a certain date, he will probably suffer the same fate as Rodgers and Di Matteo.
Don't actually think they'll be basing this on the cup.