My Seattle Mariners playoff roster prediction

Seattle will play in either Cleveland or Toronto this weekend, but it shouldn't affect who is on the roster. Take a look at my roster prediction for Seattle's first playoff series in 21 years.

On Monday night the Mariners lost Sam Haggerty to a gruesome injury sliding into second base. The injury is unfortunate for Haggerty, who has had a phenomenal season.

His injury and Seattle’s playoff clinch have heated up a new discussion, how does Seattle fill out the playoff roster? These 26 players can help Seattle reach the ALDS, let’s take a look.

Starters- Luis Castillo, Robbie Ray, Logan Gilbert, George Kirby (4)

This group is pretty self-explanatory. Marco Gonzales will be emptying his clip for the final regular season game for Seattle tomorrow, so he will not be on the roster. All four players should be expected to pitch in the weekend series, with Kirby coming out of the bullpen.

Relievers- Andrés Muñoz, Paul Sewald, Erik Swanson, Matt Brash, Penn Murfee, Diego Castillo, Matthew Boyd (7)

The reliever list was much more difficult because Seattle indicated they would go with 10 or 11 relievers for the postseason roster. Muñoz, Sewald, Swanson, and Brash are slam dunks, but there is a debate to be had after those four.

Murfee has had a role as the “swing man” all season, so his spot should be secure. Diego Castillo is extremely unreliable but has the most playoff experience of the group by far, and his stuff has looked electric recently.

The last spot is the tough one. Matthew Festa has been great all season up until his last 7 outings. Festa has given up 7 earned runs in his last seven games, while also walking 5 batters.

Matthew Boyd has been terrific in a stretched-out role, which can be very valuable in the playoffs. Seattle may choose to go with Festa for Toronto however, because of the heavy right-handed lineup.