Assistant pitching coach Juan Nieves entered the Detroit Tigers' clubhouse and exited alongside right-handed reliever Wily Peralta. Less than an hour later, manager A.J. Hinch announced his roster decision.
The return of left-hander Eduardo Rodriguez — who had been on the restricted list since June 13 — to the Tigers on Friday meant one of his teammates would be removed from the 26-man and 40-man roster.
Peralta, a 33-year-old veteran, was designated for assignment.
"Very difficult conversation," manager A.J. Hinch said. "He handled it like a pro, and he's done nothing wrong.