The story is he got the job on Jack Benny's radio show because Mary too a liking to him. Apparently at the audition when they called out his name, "Dennis Day?" He replied, "Yes Please?" She loved that nervous humor of his.
I have always like Dennis. Aside from being a very good singer, he has a great gift of comedy and could do impressions. His Tidus Moody (from The Fred Allen show) was dead on.
He was replaced by Kenny Baker during Dennis' time in the Navy.
You're right Ron, you gotta listen to Dennis Day at St. Patrick's Day.