Justin Martinez tossed a perfect inning for the Aguilas Cibaenas of the Dominican Winter League on Monday.

Martinez has been dominant in the D.R. thus far, striking out eight and walking none in six scoreless innings. He topped out at 104.2 mph last night. Martinez would seem to be very much in position to enter next year as Arizona’s closer, assuming that the team doesn’t decide to spend money to fill that slot.