Quiz Question: Baseball

For the quiz, I wanted to focus on the importance of some key baseball phrases being either one or two words.

Here is my quiz question. Edit this sentence: The leftfielder was a late addition to the line up, but it paid off when he hit two homeruns with six RBI.

Correct: The left fielder was a late addition to the lineup, but it paid off when he hit two home runs with six RBIs.