Trivium has changed drummers more in the past two years than it has in its whole career. Nick Augusto drummed for the band between 2009 and 2014, and was replaced by Mat Madiro. Madiro left in 2015 and was replaced by Paul Wandtke, who is now rumored by Blabbermouth to have left Trivium.
While nothing has been confirmed, the rumor is that Wandtke has left and has been replaced by drummer Alex Bent (Arkaik, Brian Drill, ex-Battlecross). It's kind of strange though, because on December 21 Wandtke posted about being seen on tour with his Tama kit and Meinl cymbals, with the former having the Trivium logo on the front.
But he also posted about starting a new band… so I guess we'll see?