Complex sentence: Joe then applied the "Coquina Clutch" on Heyman to send a message to Lesnar, who appeared on the June 12th episode of "Raw" and got into a brawl with Joe, which was broken up by the Raw locker room.
Split into simpler sentences: Joe then applied the "Coquina Clutch" on Heyman to send a message to Lesnar. The following week, Lesnar got into a brawl with Joe, which was broken up by the Raw locker room.