I was watching "Topper Returns" on TCM, and Rochester was in it as Cosmo Topper's cheauffer, Edward. Watching him in that movie was great. Especially in one scene where he's rushing to his room, and "packing" a suitcase. Mrs. Topper (Billie Burke) walked in and asked him "Edward, where are you going?", and he replied, "Back to Mr. Benny!". I couldn't stop laughing.

He also had a part in "Brewster's Millions". The 1945 version, as Brewster's "sidekick". Along with a few "hints" about him working for Jack Benny.
Rochester had a cameo part in an episode of "Adam-12" that I had forgotten about. It was on Antenna-TV just recently. Rochester played a man stuck out on a window ledge, when Malloy (Martin Milner) and Reed (Kent McCord) had to "talk" him out of not jumping. Rochester managed to convince them he was only bird watching and got himself stuck on a hook and couldn't move.