How Kenley Jansen rediscovered himself with Boston Red Sox - ESPN

Red Sox welcome Kenley Jansen, 'fully expected' fans to jeer offseason - ESPN

Would Shohei Ohtani play for the Red Sox?

ESPN Player Rater Retrospective - FantraxHQ

No man is an island, especially Dodgers closer Kenley Jansen - Los Angeles Times

Mariano Rivera - Wikipedia

A 2010 ESPN survey to players found MLB's best umpire to be Jim Joyce, the umpire who botched Galarraga's perfect game. Additionally, only 13% of players believed that the call should be

Kenley Jansen - Boston Red Sox Relief Pitcher - ESPN

Red Sox Rumors: Kenley Jansen Agrees to 2-Year, $32M Contract in MLB Free Agency, News, Scores, Highlights, Stats, and Rumors

Red Sox closer Kenley Jansen knows he must change now that MLB's rules have as well - The Athletic