Item missing in the game

A quick look and:

[url]http://www.wowhead.com/item=23072/fists-of-the-unrelenting[/url]

Display ID [B]3986[/B]

DisplayId acquired by entering &xml on the wowhead.com URL, next to the item's ID, thus
[url]http://www.wowhead.com/item=23072&xml[/url]

Therefore it might be this from the ItemDisplayInfo.dbc file:
[COLOR="#0000FF"]3986,"","","","","INV_Gauntlets_09",1,0,"",0,0,11,0,0,"","Plate_D_04_Glove_AL","Plate_D_04_Glove_HA","","","","","",0[/COLOR]

I'll deal with as soon as I have finished with Darrowshire, unless someone else does it.

It is not that simple.

[URL="http://www.wowwiki.com/Fists_of_the_Unrelenting?oldid=251413"]Here[/URL] we see a bit different set of stats. By date: patch 1.12.0.
[URL="http://www.wowwiki.com/Fists_of_the_Unrelenting?oldid=343958"]Here[/URL] is said that the item was found in drop only in Naxxramas beta-test, later it "can not be aquired ingame". Patch 1.12.2.
[URL="http://www.wowwiki.com/Fists_of_the_Unrelenting?oldid=370922"]Here[/URL]: it is added back as a drop from Sapphiron, the same stats. Patch 2.0.3.
[URL="http://www.wowwiki.com/Fists_of_the_Unrelenting?oldid=596201"]Here[/URL]: a bit different set of stats. Patch 2.1.0.
[URL="http://www.wowwiki.com/Fists_of_the_Unrelenting?oldid=1060023"]Here[/URL]: yet another set of stats. Patch 2.3.2.
[URL="http://www.wowwiki.com/Fists_of_the_Unrelenting"]The last version[/URL] tells that it was removed in Patch 3.0.2. However, the final mentioned stats differ from ones by wowhead.

So, it was never available in Classic (up to us to create it there still), was available in TBC as Sapphiron drop, and was gone in former WotLK. The question is, were the item instances destroyed, or simply become not attainable with Naxxramas upgrade. Seeing wowhead stats (nerfed), I support the latter idea.

Nice bit of research there, Olion. Thanks for that :)

Considering your findings, I'll vote for leaving it out of classic, unless the powers that be really want it in.

The item is in One's database, which is good, but it is also in Two's so presumably that should be removed?

Those GM items are also in the game but no player ever received them. We should let the people decide it themself if they want to use it or not.
Although we don't need to add it to a loot table at all.

Or why did you guys implement martins fury? ;)

It is exactly about was my question. We have to ask the community, how oftenly Blizz took items out of players. I suppose it should be kept in all the later DBs but with nerfed stats from wowhead. In Zero, we may leave it also as a GM item, i.e. not attainable by players; the correct spells (auras) are to be found. Knowing the stats, it's simple task.

I do not believe it was removed. I believe it was simply no longer dropped. I never recall a player losing an item they earned through combat because Blizzard removed it. Nerfed it, yes, but not removed.