He was best known as "The Boss" in a series of Bell Canada television commercials in the 1980s and for voicing the character of Yukon Cornelius in Rudolph the Red-Nosed Reindeer.

[1] Mann voiced the character of Yukon Cornelius in the classic Rankin-Bass Christmas special Rudolph the Red-Nosed Reindeer.

According to a CBC Archives article, Mann got the job when his friend, actor Don Harron, pointed him out to producer Norman Jewison.

[2] He also played the title role in a series of Bell Canada TV commercials called "The Boss" for ten years beginning in 1981.

[3] Larry Mann died of natural causes at age 91 on 6 January 2014 in Los Angeles.