The Pittsburgh Pirates have a vacancy at the back of their bullpen, sort of. If the season started today, the team would likely use Keone Kela as their closer. Kela has experience closing from his time with the Texas Rangers and, when healthy, he has power stuff. Still, he has yet to prove that he can stay on the field consistently, so there is no sure thing that Kela will be in the closer spot.
Furthermore, the biggest factor is that Keone Kela might not be a member of the Pittsburgh Pirates organization for much longer.