Collinsworth (as voiced by NYC comedian Rob Lathan) has to start out somewhere, so here he begins by calling the action for Intellivision's
Rural New Mexico Six-on-Six Football NFL Football (and the later All-Pro Football, with the forward pass perfected by the Mattel LED handhelds years before).
Remember, "You've never lived until one of those clowns flips you upside down." It's a sound bite you hear 48 zillion times in the most mundane Madden NFL 10 game. It'd also take up 20 times the memory of one of these ROMs.
Collinsworth NFL 10 - Rated E for Effort [YouTube, thanks Ian V.]