Sean Doolittle, the Nationals' undisputed closer, hopes to lean more heavily on his slider - The Washington Post
Washington Nationals reliever Sean Doolittle heads to IL with sprained elbow - ESPN
Nationals closer Sean Doolittle is more than just his fastball - The Washington Post
Sean Doolittle's injury and usage are bigger than the Nationals; it's a league-wide bullpen dilemma - The Athletic
Sean Doolittle, Baseball's Left-Wing Lefty, Retires
10 Reasons We're Going To Miss Sean Doolittle
Sean Doolittle Returning To Washington Nationals
MLB Closers & Saves Depth Charts - 2023 Fantasy Baseball
Wire Taps: Stephen Strasburg strikes out 14 Marlins; Nationals expect Sean Doolittle and Ryan Zimmerman back today - Federal Baseball
World Series Game 1: Nationals beat Astros in thrilling opener
Today in Nationals History. Hey Nationals Fans! Check out this post…, by Nationals Communications
Dodgers stopped short by Max Scherzer, Nationals - The Boston Globe
Oakland Athletics plan to activate closer Sean Doolittle on Friday - Sports Illustrated
Ex-Marlins exec slams Nats closer for taking paternity leave during NLCS