MLB bullpen depth chart: Tracking closers throughout the season

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American League
Baltimore Orioles – Zach Britton (D. O’Day, T. Hunter)
Boston Red Sox – Koji Uehara (E. Mujica, J. Tazawa)
Chicago White Sox – David Robertson (Z. Duke, Z. Putnam)
Cleveland Indians – Cody Allen (B. Shaw)
Detroit Tigers – Joakim Soria (A. Alburquerque); Joe Nathan injured (elbow)
Houston Astros – Luke Gregerson (C. Qualls, P. Neshek)
Kansas City Royals – Greg Holland (W. Davis, K. Herrera)
Los Angeles Angels – Huston Street (J. Smith)
Minnesota Twins – Glen Perkins (C. Fien)
New York Yankees – Andrew Miller, Dellin Betances (D. Carpenter)
Oakland Athletics – Tyler Clippard (D. Otero, F. Abad); Sean Doolittle injured (shoulder)
Seattle Mariners – Fernando Rodney (D. Farquhar, Y. Medina)
Tampa Bay Rays – Brad Boxberger (G. Balfour, E. Frieri); Jake McGee injured (elbow)
Texas Rangers – Neftali Feliz (R. Mendez)
Toronto Blue Jays – Miguel Castro (B. Cecil)

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National League
Arizona Diamondbacks – Addison Reed (B. Ziegler)
Atlanta Braves –  Jason Grilli (J. Johnson)
Chicago Cubs – Hector Rondon (P. Strop)
Cincinnati Reds – Aroldis Chapman (J. Diaz, S. LeCure)
Colorado Rockies –  Adam Ottavino (R. Betancourt, J. Axford)
Los Angeles Dodgers – Joel Peralta, Chris Hatcher (Y. Garcia, J.P. Howell); Kenley Jansen injured (foot)
Miami Marlins – Steve Cishek (M. Dunn, AJ Ramos)
Milwaukee Brewers – Francisco Rodriguez (J. Broxton)
New York Mets – Jeurys Familia (C. Torres); Bobby Parnell injured (elbow)
Philadelphia Phillies – Jonathan Papelbon (K. Giles)
Pittsburgh Pirates – Mark Melancon (T. Watson, A. Bastardo)
St. Louis Cardinals – Trevor Rosenthal (J. Walden)
San Diego Padres – Craig Kimbrel (J. Benoit)
San Francisco Giants – Santiago Casilla (S. Romo)
Washington Nationals – Drew Storen (A. Barrett)