2021 saw Yusei Kikuchi's MLB performance improve with an increased strikeout rate and faster average fastball, prompting the Mariners to reconsider his $56M contract.

Yusei Kikuchi's first two seasons in Major League Baseball (MLB) did not meet expectations, posting an ERA north of 5.00 with a 16.1% strikeout rate. However, in 2021, Kikuchi's results improved, with an average fastball jump of 2.5 mph, a 50% increase in his strikeout rate, and better command. The Mariners face a decision regarding Kikuchi's contract, as his four-year, $56MM guarantee looks regrettable in light of his mixed MLB performance.