Sabermetricians identified two flaws with using batting average to measure the value of players.
What are they?

 Most likely, batting average calculates the number of hits or home runs per times at bat, and does not account for walks and sacrifices.

Explanation: A batter who gets a lot of walks (base on balls) has a lower average than a hitter who gets a lot of singles. And that does not account or the batter's important skill to distinguish between a good pitch worth taking a swing and a pitch that's out of the strike zone. He gets on base and avoids an out.

A sacrifice (often a bunt) to advance another runner counts against the batting average, and may lower a player's "value" in the minds of those who look only at the batting average. Yet, the sacrifice was probably called for by the manager in order to improve the chances of having a player score a run.

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44th president of the united states