Deaths of note from around the world:

Frank Bank, 71: Actor best-known for playing dim-witted Clarence “Lumpy” Rutherford on the classic television comedy “Leave It to Beaver.” Bank’s character was pals with Wally Cleaver, Beaver’s older brother, on the show, which aired 235 episodes from 1957 to 1963. Displaying an intelligence that belied his oafish sitcome character, Bank gave up acting shortly after the show left the air and became a successful stockbroker in Los Angeles. His clients included “Beaver” co-stars Jerry Mathers and Barbara Billingsley. Died Saturday. No other details were reported.

Carl Williams, 53: Former world heavyweight boxing champion who built a reputation for taking on the best fighters of his era. Nicknamed “The Truth” for his ability to make believers of opponents and critics. Williams held the International Boxing Federation version of the heavyweight championship until 1985, when he lost a controversial 15-round decision to Larry Holmes. Williams defeated such boxing luminaries of the era as James “Quick” Tillis, Bert Cooper, Jesse Ferguson and Trevor Berbick. His career went downhill, however, after he was knocked out in 93 seconds by Mike Tyson in 1989. Williams had been working in New York City as a fire safety director for Verizon. Died April 7 in Valhalla, N.Y.

Nathan Azrin, 82: A behavioral psychologist and protege of Harvard behavioral pioneer B.F. Skinner. Azrin developed a system called “token economics,” which he and colleague Teodoro Ayllon used in groundbreaking therapy that changed the way psychologists approached behavior-changing techniques across a wide spectrum, including treatment for autism. military training and consumer marketing. Died March 29 in Pompano Beach, Fla.

— From wire reports