Baseball

Set	Description	Cards in Set	Size
Base set		660	2.5 x 3.5 inches
Red Team Checklists		24	2.5 x 3.5 inches
Traded		44	2.5 x 3.5 inches

Parallel Sets

Since 1965, the Canadian candy company O-Pee-Chee

O-Pee-Chee

The O-Pee-Chee Company, Ltd. was a 20th-century Canadian confectionery company that produced candy until the mid 1990s. The company, based in London, Ontario, was originally owned by the McDermid family . The company was later owned by Frank Leahy and then, sold to his son in law, Gary Koreen...

 produced virtually identical, but smaller, sets identical to the Topps issue of the same year. The Canadian printed cards

1970s O-Pee-Chee

In the 1970s, O-Pee-Chee produced a licensed version of the American Topps sets throughout the decade.The Canadian printed O-Pee-Chee cards tended to be printed on lighter grey cardstock and often included traded lines on the front of the cards. In 1970, due to Canadian law, the cards were modified...

 were printed on grey cardstock and featured French and English text on the reverse. The 1974 set featured yellow backs rather than green used by Topps.

Set	Description	Cards in Set	Size
O-Pee-Chee		660	2.5 x 3.5 inches
Red Team Checklists		24	2.5 x 3.5 inches

Football

In 1974, Topps issued three Football

American football

American football is a sport played between two teams of eleven with the objective of scoring points by advancing the ball into the opposing team's end zone. Known in the United States simply as football, it may also be referred to informally as gridiron football. The ball can be advanced by...

 sets featuring the National Football League

National Football League

The National Football League is the highest level of professional American football in the United States, and is considered the top professional American football league in the world. It was formed by eleven teams in 1920 as the American Professional Football Association, with the league changing...

.

Set	Description	Cards in Set	Size
Base set		528	2.5 x 3.5 inches
Parker Brothers Parker Brothers Parker Brothers is a toy and game manufacturer and brand. Since 1883, the company has published more than 1,800 games; among their best known products are Monopoly, Cluedo , Sorry, Risk, Trivial Pursuit, Ouija, Aggravation, and Probe...  Pro Draft		50	2.5 x 3.5 inches
Team Checklists		26	2.5 x 3.5 inches

Hockey

Set	Description	Cards in Set	Size
Base set		264	2.5 x 3.5 inches

Basketball

Topps issued one set featuring the two professional basketball leagues, the National Basketball Association

National Basketball Association

The National Basketball Association is the pre-eminent men's professional basketball league in North America. It consists of thirty franchised member clubs, of which twenty-nine are located in the United States and one in Canada...

 and the American Basketball Association, playing during the 1974-1975 season.

Set	Description	Cards in Set	Size
Base set		264	2.5 x 3.5 inches