The story
Because such a ball is hit straight at 'em (at them).
Etymology from Wiktionary, CC BY-SA 4.0.
at 'em ball
Today it means: A hard-hit batted ball hit straight at a fielder in the air for an out. Full definition →
Today it means: A hard-hit batted ball hit straight at a fielder in the air for an out. Full definition →
Because such a ball is hit straight at 'em (at them).
Etymology from Wiktionary, CC BY-SA 4.0.