How old is said box? I'd like to have a reference to how long GW has been stagnant in their game production.
I'm not sure. The rulebook says "2002 Edition" and "Copyright 2002". It doesn't have Wrestle as a skill, so it's pre-LRB5. There's only 12 team rosters in the rulebook (Chaos Dwarf, Chaos, Dark Elf, Dwarf, Goblin, Halfling, High Elf, Human, Orc, Skaven, Undead, and Wood Elf.) Interestingly, the Star Player list has Silibili available for the Lizardman team, but doesn't list Lizardman as a playable team. Wood Elf catchers were still 9/2/4/7.
I got it pretty recently before BB went out of print, but I don't know if this was the most recent in-print edition, or maybe it was an even older edition that happened to be sitting around a while.