<p>Who was the one who made the error in the third inning?</p>
<p>Is the first who correct, or should it be ‘’‘whom’’ ???</p>
<p>“Who”</p>
<p>It’s basically no different from:</p>
<p>Who is he? etc.</p>
<p>Or strip down the sentence to:</p>
<p>Who made the error in the third inning?</p>
<p>Your question reminds me of the well known skit “Who’s on first?”</p>
<p>See: [Who’s</a> on First? by Abbott and Costello](<a href=“http://www.baseball-almanac.com/humor4.shtml]Who’s”>Who's on First? by Abbott and Costello)</p>
<p>^Looool</p>
<p>I know it is ‘‘who’’, but I wanted to test somebody.</p>
<p>Who - subjective</p>