How about a thread with alternate history athletic careers? I'll start with a few:
Dale Murphy: Catcher, first baseman, outfielder, and designated hitter for the Atlanta Braves (1978-1979) and Milwaukee Brewers (1980-1997). Was part of six World Series championship teams, and five additional AL pennants. Before his career ended when the Brewers moved to the NL in 1998, Murphy would total 3,012 hits and 501 home runs. Elected to the Hall of Fame in 2002.
Cal Ripken: Third baseman for the Milwaukee Brewers (1981-2000). Known as one of the "Durable Duo" alongside Dale Murphy, Ripken gets more recognition for having never missed a game at third base in his career, during which he totaled 3,411 hits and 436 home runs. Entered the Hall of Fame in 2005.
Joe Montana: Quarterback with the Chicago Bears (1979-1995). Best known for winning five straight Super Bowls in the 1980s (1984, 1985, 1986, 1987, 1988), and winning eight overall. Passed for 41,798 yards and 288 touchdowns. Entered the Hall of Fame in 2000.