As the Seattle Mariners watch yet another playoffs from their respective couches, they find themselves wondering what could have been. Or rather, how close they could have been had they acquired or retained certain players.

Nowhere is this more relevant than in Washington, where the Nationals employ four former Mariners and two extremely important pieces of their team that were this close to becoming Mariners. Here’s a look at those players.

Anthony Rendon

Widely panned as the best hitter in his draft class, Rendon was taken sixth overall in the 2011 MLB Draft. The Mariners had the second overall pick that year. They took left-handed pitcher Danny Hultzen, who has had his share of troubles thanks to a rash of injuries. Rendon, on the other hand, led the league in runs scored in 2014 (only his second season in the majors), hit 21 home runs, drove in 83 runs, swiped 17 bags and hit .287 with a .824 OPS.

Positional log jams aside, the Mariners are probably wishing they had Rendon’s bat in their lineup.

Stephen Strasburg

Strasburg is the one player on this list who Seattle didn’t have on their team, or could have drafted. Yet, he still represents one of the biggest, “what ifs?” in Mariners’ history.

Simply put, Seattle and Washington were both awful in 2008. Both had a legitimate shot at the number one overall pick in the upcoming draft – at the time, widely believed to be Strasburg. Seattle won four of its last six to finish 61-101 while Washington lost five of their last six to finish 59-102. The Mariners already have two of the best starters in the league in Felix Hernandez and Hisashi Iwakuma, plus talented youngsters James Paxton and Taijuan Walker. If Strasburg drafted by the M’s and in that rotation, the Mariners’ playoff drought would be a thing of the past.

Doug Fister

The first of many former M’s on this list, Fister was traded from the Emerald City to Detroit along with David Pauley for Charlie Furbush, Casper Wells, Chance Ruffin and minor league prospect Francisco Martinez.

Since then, Fister went on to pitch fantastically in his 2 ½ years in Detroit, posting 32 wins—20 more than his total in 2 ½ years in Seattle— and turning in an ERA under four in every season. He also posted some absurd strikeout-to-walk ratios. Down the stretch in 2011 he struck out 57 batters while walking five over 70 innings.

The players Seattle got in return?

Wells would post decent power numbers in his brief time in Seattle before getting pushed out of a crowded outfield and finding himself with three different organizations not named the Seattle Mariners in 2013. He drove in a singular run in 53 games. Martinez was eventually traded back to Detroit for a PTBNL while Ruffin recently retired. Furbush was the only solid player Seattle got back. He’s provided a dependable reliever, but is buried in a deep bullpen.

Detroit would later send Fister to Washington, but the current Nationals pitcher is just another reminder of what could have been for Seattle.

Matt Thornton and Rafael Soriano

Seattle isn’t short on relievers at the moment, but Thornton and Soriano are two more examples of players who got away. Thornton, a former first round pick of the Mariners, was dealt to Chicago in 2006 for outfielder Joe Borchard. He went on to enjoy a long stint in the Windy City before moving to Boston midway through last season. He won a ring with the Red Sox and split 2014 with the Yankees and Nationals, posting a cumulative 1.75 ERA over 64 innings. For his career, Thornton has a 3.43 ERA in 670 appearances and an All-Star appearance to his name.

Soriano is the more sorely missed of the two. While Fernando Rodney has been superb as the M’s closer, and the has gotten by with a string of quality closers, Soriano has been superb in his career.

Upon leaving Seattle he moved to Atlanta, in a trade that will be addressed later, and in two years posted ERAs of 3.00 and 2.57 before taking over the closer’s role in 2009 and turning in a 2.97 ERA with 27 saves. He was traded to Tampa Bay and promptly led the league with 45 saves. He pitched to a tremendous 1.73 ERA and finished in the top 12 in Cy Young and MVP voting. After a year in Tampa he moved to the Yankees where he had a slight down year with a 4.12 ERA in 42 games before bouncing back to save 42 games and post a 2.26 ERA in 2012. He placed 20^th in MVP voting that year. He then signed with Washington where he has accumulated 75 saves over the past two seasons with a collective 3.15 ERA.

Since leaving the Mariners, Soriano has appeared in 469 games, posted a 2.84 ERA and recorded 203 saves.

Now we get to the trade that was mentioned earlier.

The Mariners traded Soriano to the Atlanta Braves for Horacio Ramirez.

Yes, that Horacio Ramirez who’s ERA over 20 starts and 98 innings was 7.16. You heard me correctly, 7.16! Yes, that Horacio Ramirez who let righties hit .340 off of him. Yes, that Horacio Ramirez who allowed lefties to hit .330 against him. Yes, that Horacio Ramirez.

The Mariners traded away a reliever who would become one of the game’s finest at his position for a back-of-the-rotation starter who posted an ERA over seven in nearly 100 innings.

Yikes.

Asdrubal Cabrera

Another Mariner traded away for relatively nothing, Cabrera was lost to Cleveland in “The Great Highway Robbery/Fleecing of 2006.” Cleveland traded Ben Broussard and Eduardo Perez to Seattle in two different trades. Seattle gave up Shin-Soo Choo and Asdrubal Cabrera respectively.

Cabrera would go on to establish himself as a premium two-way shortstop, culminating with a 2011 season in which he hit .273 with 25 home runs, 92 runs driven in, 17 stolen bases and a .792 OPS. Cabrera would make two All-Star appearances in Cleveland before moving to Washington at this past trade deadline. While he isn’t a threat to hit anywhere near 25 homers, he still provides pop and solid defense for a middle infielder.

In Conclusion

It’s easy to sit and think, “what if this?” or, “what if that?”, especially with the Mariners. But the reality is that Seattle has a history of letting players go too early, as well has just missing acquiring players who could turn into important cogs. Those players go on to become impact players elsewhere. There are quite a few former Mariners and almost-Mariners in various MLB cities playing vital roles to their teams. The Washington Nationals just happen to have more than most. For the Mariners, it’s a reminder of what could have been.

All stats courtesy of http://www.baseball-reference.com/ unless otherwise noted.

You can see the piece in it’s entirety on Kingdome of Seattle Sports here.