Jeremy Hellickson has not aged very well for a changeup pitcher, and has struggled to come back from his injury in 2014; 2016 was decent, but 2015 and 2017... not so much. And he's only a year older than Cobb. I'm more concerned about Cobb's inability to stay healthy enough to start 30 games in a season during his physical prime than his pitch types, particularly on a 4-year deal. I'd be OK with Cobb on a 2-year deal, but a four year deal no way. For every Hellickson, there's a Hendricks or an Estrada or a Chase Anderson. There's one guy in the majors who's had success late in his career throwing a fastball as much as Lynn...and that's Bartolo Colon. From 2012 to 2017, the pitchers who threw 70% or more fastballs as a SP include Colon, Lynn, Masterson, Zach McCallister, Jarred Cosart, Juan Nicasio, Tyler Chatwood. Lynn and Colon are the only guys that are any good. Pitching that way simply isn't sustainable. That pitching style is not sustainable, while plenty of guys with great changeups pitch well into their mid 30s. I'm convinced that Bartolo Colon is going to pitch into his 50's. Guy is unreal