Hyun Jin Ryu
Ryu wound up spending parts of four years in a Blue Jays uniform before returning to free agency. His career in the States has been mired by injuries and his Jays tenure proved to be no different. In fact, he made over 30 starts with the club just one time and missed practically an entire season's worth of starts thanks to his second Tommy John surgery.
For the most part, the southpaw was as efficient as they come when he was healthy. In a total of 60 starts for the Blue Jays, he went 24-15 wtih a 3.97 ERA and 110 ERA+. Those numbers don't quite match where he was at with the Dodgers, but he served his purpose, and then some.
After returning from TJS, Ryu was a consistently strong weapon for the Jays this year, posting a 3.46 ERA in 11 starts. Once he was added back to the rotation picture, he could routinely be relied upon to go five or so innings and keep the Jays in the ballgame.
Looking ahead to next season, it's not that there won't be interest from the Blue Jays to bring the 36-year-old back. He may have had some durability questions, but he remains a strong starting pitcher that could easily replicate his 11-start stat line next year. The fact that he did well to rebuild his value a bit suggests that the Jays will be far from the only team targeting. There are going to be many teams around the league interested in bringing in a veteran presence, possibly even including another AL East team in the Baltimore Orioles.