Something To Fear
As the survivors from the van are captured, Mike is seen pointing a gun at Rick. An unnamed Savior then orders him to send a signal to Negan. He fires a gunshot into the air, and a few moments later, Negan and the other Saviors arrive. He later witnesses as Negan bashes Glenn‘s head in.
All Out War
He is seen with Negan when they capture Eugene. Later on, Mike is seen preparing for the assault against the Hilltop Colony with the other Saviors. He then takes part in the assault and once the gate comes down, he rides a motorcycle into the battlefield. Not long after, Rick shoots and kills Mike, his corpse is seen falling off his motorcycle.