

Team-focused Amumu data from 3,584 Master+ coordinated 5v5 games, including Flex 5 and Ranked 5v5 data where available. This is not Solo Queue data. Amumu has an observed 52.6% win rate as Jungle in the current sample.
Items for the selected keystone (2709 games).
Most observed exact rune page per keystone.
Who Amumu beats and struggles against in Master+ coordinated games.
Amumu counters lists the best and worst picks versus Amumu in Master+ coordinated 5v5.
Build around Amumu Jungle: team style, supports and alternatives from Master+ coordinated games.
Stats are useful, but they don't always tell the whole story. These are kit synergies and natural counters.
Data-backed notes from the Amumu Master+ sample on this page.
In LoL Tracker's Master+ coordinated sample on patch 26.20, Amumu is tracked primarily as Jungle across 3,584 games with an observed 52.6% win rate. These results come from Flex 5 and Ranked 5v5 team games rather than standard Solo Queue.
Amumu appears most frequently in Scaling Teamfight drafts across 3,463 observed games in that style.