At the time of his career, Mummery was the largest player ever in the NHA and NHL, playing at 245 pounds in his NHL years and he was known to eat two steaks before hockey games. Mummery appeared in three games as an NHL goaltender in an era when teams did not dress a backup netminder, making him the skater to have played the most games in net. He suited up as a goaltender twice with Quebec and once with Hamilton.