Prompted by the retirement of Brent Musburger, Mike Hall tweeted this:
Here's an impossible task: American Sportcaster Mount Rushmore. You only can put up 4. I think Brent's in there. Who ya got?— Mike Hall (@BTNMikeHall) January 25, 2017
Someone in response pointed out that one needs to differentiate between "sportscaster" and "play-by-play" guy, which is probably wise.
It's not easy. I don't think Brent is there (he would make the college football mount, along with Keith, Verne, and... hard to narrow down a fourth. Maybe Joe Tess in a few years).
Focusing on just play-by-play guys, I would list Al Michaels, Vin Scully, Howard Cosell, and Keith Jackson, even though I'm not a big fan of Cosell even granted the generational differences there.
Brent actually has a better case if you expand the field beyond play-by-play, because he was an iconic studio host for CBS for years. Cosell fares well there, too. Jim Nantz becomes a legit candidate, even though I don't like him, as do guys like Chris Fowler.
Who ya got?