James Paxton will earn a $750,000 bonus for reaching 10 games and another $750,000 at 20 games (for a maximum of $10 million). The ZiPS projection is based on 23 starts.
Paxton joins a Seattle rotation headed by fellow lefthanders Marco Gonzales, Justus Sheffield and Yusei Kikuchi, who last year combined for 4.7 fWAR in 30 starts. The projected fifth slot goes to 26-year-old righthander Chris Flexen, a refugee from the Korean Baseball Organization. Vying for the final slot in the six-man rotation will be 25-year-old righthander Justin Dunn and 24-year-old lefthander Nick Margevicius, who last year combined for a 4.39 ERA in 17 starts (although Dunn had concerning peripherals and Margevicius was less impressive in three relief appearances). The Mariners have three starters among the Top 70 prospects at Baseball Prospectus and, if disgraced former president Kevin Mather is to be believed, righthander Logan Gilbert will be called up in April.
Which is more than anyone wanted to know.