pick off

Short definition from Wiktionary

Verb

1. 1
   To remove by picking.
2. 2
   To dispose of tasks, obstacles, opponents etc. precisely, one by one.
3. 3
   To dispose of tasks, obstacles, opponents etc. precisely, one by one: To shoot one by one.
4. 4
   To throw out a runner by tagging them whilst they are not in contact with any of the three bases or home plate.
5. 5
   To intercept, such as a ball in flight.

Noun

1. 1
   An instance of throwing out a batter leading off base.