Zac Diles

Brian Cushing is taking the death of his former USC teammate, Joe McKnight, very hard ... so says Brian's friend Zac Diles. Zac -- who played on the Houston Texans with Cushing -- says he spoke with the linebacker hours after the news broke about McKnight ... and he's "very, very distraught."…

Cleveland Browns linebacker Zac Diles is officially in the fashion game -- and his company is selling an Italian cashmere baseball cap ... FOR $1,200 EACH!!! TMZ Sports has learned ... Diles is a part owner of Melin ... a company that specializes in high-end designer headwear. The company uses…