Code:
Team G W L PCT APP WS
New York Yankees 4,669 2,626 2,043 0.562 15 4
Boston Red Sox 4,672 2,517 2,155 0.539 11 2
Atlanta Braves 4,668 2,493 2,175 0.534 15 1
St. Louis Cardinals 4,673 2,458 2,215 0.526 10 2
Los Angeles Dodgers 4,667 2,451 2,216 0.525 9 2
Houston Astros 4,679 2,440 2,239 0.521 8 0
Oakland Athletics 4,673 2,432 2,241 0.520 10 1
Chicago White Sox 4,674 2,402 2,272 0.514 4 1
Toronto Blue Jays 4,676 2,395 2,281 0.512 5 2
Los Angeles Angels 4,675 2,382 2,293 0.510 7 1
San Francisco Giants 4,677 2,382 2,295 0.509 7 0
New York Mets 4,666 2,373 2,293 0.509 5 1
Arizona Diamondbacks 1,880 942 938 0.501 4 1
Philadelphia Phillies 4,673 2,327 2,346 0.498 5 2
Cleveland Indians 4,668 2,324 2,344 0.498 7 0
Cincinnati Reds 4,678 2,307 2,371 0.493 2 1
Minnesota Twins 4,675 2,275 2,400 0.487 6 2
Baltimore Orioles 4,668 2,269 2,399 0.486 3 1
Texas Rangers 4,670 2,269 2,401 0.486 3 0
Washington Nationals 4,673 2,268 2,405 0.485 1 0
Milwaukee Brewers 4,673 2,256 2,417 0.483 2 0
Chicago Cubs 4,666 2,248 2,418 0.482 5 0
San Diego Padres 4,683 2,252 2,431 0.481 5 0
Seattle Mariners 4,674 2,240 2,434 0.479 4 0
Detroit Tigers 4,674 2,236 2,438 0.478 3 1
Florida Marlins 2,622 1,246 1,376 0.475 2 2
Colorado Rockies 2,627 1,242 1,385 0.473 2 0
Kansas City Royals 4,665 2,196 2,469 0.471 3 1
Pittsburgh Pirates 4,667 2,168 2,499 0.465 3 0
Tampa Bay Rays 1,877 796 1,081 0.424 2 0
So as far as winning percentage, the Reds are middle of the pack in this 30-year period. However, only the Nationals/Expos and Brewers have as few playoff appearances as the Reds (with exception to the four expansion teams that have entered the league since then). It's worth pointing out, though, that along with Kansas City, San Diego, Baltimore and Pittsburgh, the six teams residing in the smallest media markets in Major League Baseball of the ones that have been around during this entire span, also have the fewest playoff appearances.