Watching the game last night, I heard Target Field play "Let It Be" during the challenge review. "Pretty clever," I thought, before realizing that that's surely happened at football and hockey games too, and long before baseball.
Still... it generated this idea. Go ahead and select the musical score for a baseball game. Here's the standard categories, and add your own as you see fit (or steal from others that others see fit). Heck, suggest a category for others too - no need to have an answer before you ask the question!
Strikeout (swinging? looking?)
Great fielding play
Umpire Review (overturn, uphold)
Injury time out
Second pitching change in an inning
Starter gets pulled after a great outing
Rain delay (just one song)
Delay because of streaker/animal on the field/other unusual