He got on base with a walk.
The pitcher gave up a walk.
The batter took a close pitch and drew a walk.
The pitcher lost control and gave up a walk.
四球 lets the batter reach base without swinging fair, while 三振 means the batter is struck out.
In baseball, a walk is naturally counted as one occurrence.
intentional walk; intentional base on balls; IBB
Compound of 四 (four) and 球 (ball), referring to the four balls that result in a walk.
The player who reached first on a walk attempted to steal a base.