Closers

noun

1. Someone or something that closes.

   "In our organization, the VP of Sales usually acts as the closer."

2. Someone or something that concludes.

   "The DJ chose a fantastic track as his closer at the end of the night."

3. The last stone in a horizontal course, if smaller than the others; a piece of brick finishing a course.
4. A relief pitcher who specializes in getting the last three outs of the game. See Wikipedia:closer (baseball)

   "They brought their closer in for the ninth."