A History of Short Words

From the New York Times Crossword Puzzle

MRT

Tue, 3 Aug '21
Old TV star with the catchphrase "I pity the fool"
Sun, 4 Jul '21
Actor who was once crowned "America's Toughest Bouncer"
Sun, 27 Jun '21
"I 30-Down the fool!" speaker
Fri, 12 Feb '21
TV/film star who became a pro wrestler