Mark Leiter Jr. is the type of guy every team needs, but no one really ever wants to have to use. He’s a replacement level player occupying the long man/spot starter role who was thrust into 90 innings this year.
Relative to expectations (of which there were none), Leiter did his job. Thanks to a basically league average strikeout rate (21.3%) and a slightly above average walk rate (7.9%), he wasn’t below replacement level, despite allowing 21% of his fly balls to go over the fence. Maybe there’s a little bit of bad luck involved there, as HR/FB% is one of the noisiest stats and the league average is just 13.