Tenn. R. App. P. 14
Advisory Commission Comments.
Although the appellate court should generally consider only those facts established at trial, it occasionally is necessary for the appellate court to be advised of matters arising after judgment. These facts, unrelated to the merits and not genuinely disputed, are necessary to keep the record up to date. This rule gives the appellate court discretion to consider such facts. This rule is not intended to permit a retrial in the appellate court.