Briar vs Zac Jungle Matchup
Briar Jungle wins 49.6% of 1,098 Low Elo games against Zac Jungle, -0.9 points vs expected, 2-patch window 26.19-26.20.
Researched on LoL patch 26.20. Tips are written to hold at any rank; stats come from Low Elo ranked games up to patch 26.20.
How to play as Briar
If Zac starts charging Elastic Slingshot(E) to escape, wait for the windup and use Head Rush(Q) then; Briar players recommend saving Q so he cannot jump away.
Use your clear tempo for an early gank or invade, but avoid starting a teamfight into Zac; Briar mains recommend targeting valuable backliners with R or cleaning up after Zac engages because he is hard to burst while his team can help.
Head Rush(Q) can stun Zac while he is charging Elastic Slingshot(E), interrupting the launch.
Sources
These notes come from r/BriarMains, checked against the champions' abilities.