Following a seven-day notice of approach from Hednesford Town, Endall will be leaving the club in search of regular game time.
The club added in a statement: "We fully support his decision, given his lack of game time recently and we thank Josh for his efforts in his short time at the Boro and wish him well for the future."
Carr will join Avro FC on dual-registration in search for more game time. He will continue to train with Stafford Rangers.
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