The Nationals have one Division Championship to their name, back when they were the Montreal Expos in 1981. That year was also the only year they made it to the National League Championship Series.
Also, unfortunately for the franchise, in 1994 when they were the Expos, they had a league leading 74-40 record before the season was shortened by the strike, killing any playoff hopes that team had.
That 1994 team was loaded with such players as Moises Alou, Larry Walker and Pedro Martinez.
On the other side, we have the Mariners.
The M's have three division titles as well as one wild card berth. Obviously, never going beyond the ALCS.
The 2001 Mariners tied the Major League record for single-season wins with 116, but failed to cap the season with a ring.
The 1995 Mariners, having one of the best comebacks in ALDS history against the Yankees, were loaded with young talent with the likes of Ken Griffey Jr, Alex Rodriguez, Edgar Martinez and Randy Johnson. Once again not going beyond the ALCS.
So, both teams have had their chances in the past, some better than others, with neither taking advantage.
How about the future?
Let’s compare the two and see if we can find a clear answer as to which team will not be the last one to reach the Series.