Moshiri was reacting after a 4-1 derby defeat to Liverpool stretched a run of miserable form which has seen them pick up just two points from the last 24 available in the league.
"Football is about crisis one day and glory the following day," he told Talksport.
"Rafa is a good manager and underperformance is largely due to the injuries.
“Next two weeks, we will get to a full squad and, in the meantime, results will improve.
“Rafa needs time to have his mark on the squad. He will be supported to add depth to the squad. Managers need time.
“I have no doubt that we will have a strong second-half to the season."
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