It's curious that Baseball Trade Values lists Seattle lefthander Yusei Kikuchi with a surplus value of $1.2 million with two years and $30 million left on his contract but lists Seattle third baseman Kyle Seager with a negative value $13.5 million with two years* and $33 million remaining on his contract:
https://www.baseballtradevalues.com/teams/478/
Since the start of the 2019 season Kikuchi has posted 1.4 fWAR, valued at $10.8 million, in 41 starts covering 208.2 innings. Over the same period Seager has posted 4.5 fWAR, valued at $35.9 million, in 166 games:
https://www.fangraphs.com/players/yusei-kikuchi/20633/stats?position=P
https://www.fangraphs.com/players/kyle-seager/9785/stats?position=3B
* the 2022 club option of $15 million to $20 million becomes a player option if Seager is traded. Most speculate, perhaps erroneously, that Seager would exercise the player option. https://legacy.baseballprospectus.com/compensation/cots/al-west/seattle-mariners/