Wiktionary
extended playing time
n. (context sports English) In a one-sided sporting contest, when junior varsity players (i.e., second-string- and third-string players) play a majority of a varsity game.
Usage examples of "extended playing time".
Placing the grooves closer together also extended playing time, however, wider groove spacing allowed bigger wiggles to be recorded, and thus, louder sounds.
Larger discs extended playing time, but increased storage and transport difficulties.