Which actor played the trainer of Rocky Balboa in Rocky 3?

First it was Mickey Goldmill "Burgess Meredith" until he died, then Apollo Creed "Carl Weathers" along with his old trainer Duke "Tony Burton". Burgess Meredith played the role of Rocky's trainer in the original "Rocky" and had a role in all the sequels. He died on 9 Sept 1997, but www.imdb.com also listed him as a cast member in the 2006 "Rocky Balboa". I have not seen this so they must have used file footage of him.