MLB Trade: Nationals acquire veteran reliever Kelvin Herrera from Royals
Former Royals pitcher Kelvin Herrera calls it a career, FOX 4 Kansas City WDAF-TV
Nats get RHP Kelvin Herrera from Royals for 3 minor leaguers
Nationals acquire 2-time All-Star reliever Kelvin Herrera from Royals for 3 minor leaguers
The Kelvin Herrera Deal, Looking Back One Year Later
Chicago White Sox and RHP Kelvin Herrera Agree to Two-Year Contract. – Blogging the Red Sox
Kelvin Herrera could be a bullpen option for the Yankees - Pinstripe Alley
Nationals acquire Kelvin Herrera. The Washington Nationals acquired…, by Nationals Communications
Royals trade Escobar to Nationals, Gutierrez to Orioles for cash considerations National News - Bally Sports
This Week in Baseball - Kelvin Herrera Trade, Astros Streak, Brandon Morrow's Pants, Bryce Harper's Beard, MLB Attendance » Foul Territory Baseball
Los Angeles Angels: Kelvin Herrera should be the team's closer