As a baseball expert, I can tell you that a walk is not considered an at-bat. An at-bat is a measure used to calculate a player's batting average and it occurs when a batter comes to the plate with the intention to get a hit, regardless of the outcome. A walk, on the other hand, is a base on balls that occurs when a batter receives four pitches outside the strike zone, in the judgment of the umpire, and is awarded first base without the liability of making an out. Walks are important for a player's on-base percentage but do not factor into the calculation of their batting average because they are not at-bats.

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Receiving a base on balls does not count as a hit or an at bat for a batter but does count as a time on base and a plate appearance. ... A hit by pitch is not counted statistically as a walk, though the effect is mostly the same, with the batter receiving a free pass to first base.read more >>