Jetta has replaced yet-to-debut midfielder Tom Couch, who has returned to the rookie list.
Couch will not be available for senior selection, unless the club upgrades him via the mid-season nominated rookie rule, which it can at any time.
Jetta has been reinstated onto the main list ahead of his return for Casey - his first match this season.
He has missed the season with an ankle injury, after playing 30 matches since debuting in 2009.
Jetta’s most recent match for Melbourne came against Port Adelaide in round 24 last year.
