The records cover franchises regardless of whether the teams relocated and/or changed names. To wit: the records for the Orioles include those of their earlier incarnations as the Milwaukee Brewers (1901) and the St. Louis Browns (1902-1953). 

Before you start kicking dirt and smashing the water cooler over the omission of the upstart teams, chew on the following. The records of the players listed have either had to withstand or overcome challenges from nearly 100 years of team history. Babe Ruth's records had to withstand the challenges of Lou Gehrig, Joe DiMaggio and Mickey Mantle. Frank Thomas had to overcome the best seasons of Shoeless Joe Jackson, Luke Appling and Carlton Fisk. The omitted teams haven't been around for 40 years…puhlease! 

On April 3, 1987 the Chicago Cubs traded veteran pitcher Dennis Eckersley to the Oakland Athletics for three prospects: David Wlder, Brian Guinn and Mark Leonette. Wilder, Guinn and Leonette never played a single game in the majors. Eckersley grudgingly went into the bullpen and became the most dominant closer the game has ever seen. 

The Red Sox once had a guy named Ruth who was their best pitcher, best hitter, and the game's biggest star. They sold him. They haven't won a World Series since. Blame Frazee, not Buckner. 

On December 15, 1900 the Cinncinati Reds traded a young prospect to the New York Giants for veteran hurler Amos Rusie. Rusie never won a single game for the Reds and he retired early in 1901 after compiling an 8.59 ERA after 3 games. As for that prospect, Christy "Big Six" Mathewson went on to win 372 games for the Giants. Mathewson also won five World Series games on his way to Cooperstown and immortality. 

Cubs