Mingo, agent unhappy about his playing time

Browns outside linebacker Barkevious Mingo isn’t happy about his playing time. Neither is his agent, Jeff Guerriero. “[Mingo] is an impact player,” Guerriero told Mary Kay Cabot of Cleveland.com Thursday. “[He] needs to be on the field. It’s that simple.” His definition of “impact player” is interesting. So, too, is the the No. 6 overall…