Born in Toronto in 1942, Doug Cain, at just three months old, developed osteomyelitis, a bone disease that eats away at the muscle. During his life, he has continually beat this disability to become a youth champion in baseball and enjoy other athletic pursuits. He started bowling while in high school at Danforth Technical School. His first year average was 184, but increased to 209 the following year, as he joined his first men's league. His average grew to 235 and he won his first high average title.

Doug's bowling average improved quickly and, in 1965, he won the Players Festival, a major pins-over average tournament conducted by the newly formed Ontario Bowlers' Congress. The prize was a trip for two to the Bahamas and, on this trip, Doug met bowling legends Bert Garside and Bill Hoult, two gentlemen who would play major roles in both Doug's life and his bowling career. For example, Bert owned a sheet metal company and, as that was Doug's trade, Bert hired him for Galco Sheet Metal from 1966-1968. Billy Hoult, on the other hand, was a top bowler of the day and, as well as building a lifelong friendship, Bill introduced Doug to the major five pin leagues of the day.

In the Major "B" league, Doug won the high average title for three consecutive years from 1964-1966. On the third occasion, the league actually gave Doug the high average trophy to keep. This show of excellence advanced Doug to the elite Toronto City Major League and he enjoyed several years of success culminating with a high average win in 1973 with a mark of 259. In addition to these high average titles, Doug also bowled on CBC television from O'Connor Bowl in their weekly television series. Doug began to bowl in the provincial Open in 1967 and was the singles representative for Scarborough on three occasions and also bowled on four men's teams. In 1971 in London, Doug won the Open singles title fending off Hall of Famer Joe Chiki of Niagara in the final game. Unfortunately, Doug could not advance to the national final as the championships were on hold due to the controversy over the elimination of the counter pin. This provincial championship, was recognized by the Borough of Scarborough as they have included Doug's name and achievement on the Hall of Fame Honour Roll in the municipal buildings.

Doug also joined the Master Bowlers' Association in 1968, representing Comet Lanes in Scarborough. A year later, Doug won the provincial Master Bantam singles title. But, of ultimate importance, Doug won the aggregate title for the 1971-72 Masters season with a 268 average. As a result, he represented Ontario at the MBAC nationals in Ottawa, ultimately losing to Pat Lemyre of British Columbia. Doug would bowl in the MBAO until 1975 and averaged 251 for 429 games. Since the bowlers took over the Open in 1965, only a select handful of bowlers have won both the Ontario Open singles and MBA singles crowns.

Following his exit from the MBA in 1975, Doug's bowling career took a break for over thirty years, but he did coach at the Open for three years, culminating with an appearance at the 1978 Ontario Winter Games with a men's team from Scarborough. Recently, he has returned to the lanes at NEB's Fun World in Oshawa, carrying a respectable 225 average. In addition, in 2009, Doug qualified for the Senior team representing his Ontario Durham zone at the provincial Open.

Today, Doug and his wife, Pauline, live in Whitby and, as well as bowling, golf and traveling, they enjoy their extended family with two children and three grandchildren.