Major League Baseball Reliever of the Month Award

Not to be confused with Major League Baseball Pitcher of the Month Award.

Major League Baseball (MLB) honors its best relief pitchers with a Reliever of the Month Award for one pitcher in the American League (AL) and one in the National League (NL) during each month of the regular season. These awards have been issued since 2017. From 2005 to 2013, MLB honored a single relief pitcher across both leagues with the Delivery Man of the Month Award during each month of the regular season.

Major League Baseball Reliever of the Month Award

Sport	Baseball
League	Major League Baseball
Awarded for	Best relief pitcher in the American League and National League
Sponsored by	The Hartford (2017–2020)
Country	United States, Canada
Presented by	Major League Baseball
History
First award	2017
Most wins	Edwin Díaz (10)
Most recent	July 2025: Edwin Díaz (NL) Kenley Jansen (AL)

Awards by month

MLB previously introduced a Reliever of the Year Award in 2014, awarded to one reliever in the American League and one in the National League.^[1] In 2017, MLB added a monthly award, also given to one reliever in each league,^[2] for each month of the regular season.^[3] The award was sponsored by The Hartford, a Connecticut-based investment and insurance company, from inception through the 2020 season.^[2][4]

The most Reliever of the Month awards won by a single player is ten by Edwin Díaz. He is followed by Josh Hader (8), Emmanuel Clase (7), and Liam Hendriks (4).

The below table lists monthly winners; a number in parentheses indicates the instance of winning the award, for players who have previously won.

Edwin Díaz has won the award five times with the Seattle Mariners and five times with the New York Mets.

Emmanuel Clase won the award seven times with the Cleveland Indians/Guardians.

Year	Month	American League		National League		Ref.
		Player	Team	Player	Team
2017	April	Cody Allen	Cleveland Indians	Greg Holland	Colorado Rockies	[2]
	May	Craig Kimbrel	Boston Red Sox	Greg Holland (2)	Colorado Rockies	[5]
	June	Roberto Osuna	Toronto Blue Jays	Kenley Jansen	Los Angeles Dodgers	[6]
	July	Edwin Díaz	Seattle Mariners	Brad Hand	San Diego Padres	[7]
	August	Álex Colomé	Tampa Bay Rays	Corey Knebel	Milwaukee Brewers	[8]
	September	Aroldis Chapman	New York Yankees	Sean Doolittle	Washington Nationals	[9]
2018	April	Edwin Díaz (2)	Seattle Mariners	Josh Hader	Milwaukee Brewers	[3]
	May	Blake Treinen	Oakland Athletics	Brad Hand (2)	San Diego Padres	[3]
	June	Edwin Díaz (3)	Seattle Mariners	Kyle Barraclough	Miami Marlins	[3]
	July	Edwin Díaz (4)	Seattle Mariners	Felipe Vázquez	Pittsburgh Pirates	[3]
	August	Edwin Díaz (5)	Seattle Mariners	Héctor Neris	Philadelphia Phillies	[3]
	September	Blake Treinen (2)	Oakland Athletics	Corey Knebel (2)	Milwaukee Brewers	[3]
2019	March–April	Shane Greene	Detroit Tigers	Kirby Yates	San Diego Padres	[3]
	May	Aroldis Chapman (2)	New York Yankees	Josh Hader (2)	Milwaukee Brewers	[3]
	June	Liam Hendriks	Oakland Athletics	Josh Hader (3)	Milwaukee Brewers	[3]
	July	Tommy Kahnle	New York Yankees	Seth Lugo	New York Mets	[3]
	August	Aroldis Chapman (3)	New York Yankees	Felipe Vázquez (2)	Pittsburgh Pirates	[3]
	September	Brandon Workman	Boston Red Sox	Brent Suter	Milwaukee Brewers	[3]
2020	July–August	Liam Hendriks (2)	Oakland Athletics	Kenley Jansen (2)	Los Angeles Dodgers	[10]
	September	Mike Mayers	Los Angeles Angels	Devin Williams	Milwaukee Brewers	[4]
2021	April	Matt Barnes	Boston Red Sox	Mark Melancon	San Diego Padres	[11]
	May	Liam Hendriks (3)	Chicago White Sox	Ryan Tepera	Chicago Cubs	[12]
	June	Lou Trivino	Oakland Athletics	Josh Hader (4)	Milwaukee Brewers	[13]
	July	Raisel Iglesias	Los Angeles Angels	Jake McGee	San Francisco Giants	[14]
	August	Emmanuel Clase	Cleveland Indians	Devin Williams (2)	Milwaukee Brewers	[15]
	September	Liam Hendriks (4)	Chicago White Sox	Camilo Doval	San Francisco Giants	[16]
2022	April	Jordan Romano	Toronto Blue Jays	Josh Hader (5)	Milwaukee Brewers	[17]
	May	Clay Holmes	New York Yankees	David Bednar	Pittsburgh Pirates	[18]
	June	Emmanuel Clase (2)	Cleveland Guardians	Edwin Díaz (6)	New York Mets	[19]
	July	Jordan Romano (2)	Toronto Blue Jays	Edwin Díaz (7)	New York Mets	[20]
	August	Emmanuel Clase (3)	Cleveland Guardians	Edwin Díaz (8)	New York Mets	[21]
	September	Emmanuel Clase (4)	Cleveland Guardians	Camilo Doval (2)	San Francisco Giants	[22]
2023	April	Félix Bautista	Baltimore Orioles	Josh Hader (6)	San Diego Padres	[23]
	May	Alex Lange	Detroit Tigers	Camilo Doval (3)	San Francisco Giants	[24]
	June	Félix Bautista (2)	Baltimore Orioles	Craig Kimbrel (2)	Philadelphia Phillies	[25]
	July	Félix Bautista (3)	Baltimore Orioles	Devin Williams	Milwaukee Brewers	[26]
	August	Andrés Muñoz	Seattle Mariners	Raisel Iglesias (2)	Atlanta Braves	[27]
	September	Clay Holmes (2)	New York Yankees	Tanner Scott	Miami Marlins	[28]
2024	April	Mason Miller	Oakland Athletics	Ryan Helsley	St. Louis Cardinals	[29]
	May	Emmanuel Clase (5)	Cleveland Guardians	Robert Suárez	San Diego Padres	[30]
	June	Carlos Estévez	Los Angeles Angels	Ryan Helsley (2)	St. Louis Cardinals	[31]
	July	Emmanuel Clase (6)	Cleveland Guardians	Tanner Scott (2)	Miami Marlins/San Diego Padres	[32]
	August	Josh Hader (7)	Houston Astros	Raisel Iglesias (3)	Atlanta Braves	[33]
	September	Emmanuel Clase (7)	Cleveland Guardians	Ryan Helsley (3)	St. Louis Cardinals	[34]
2025	April	Andrés Muñoz (2)	Seattle Mariners	Robert Suárez (2)	San Diego Padres	[35]
	May	Jhoan Durán	Minnesota Twins	Edwin Díaz (9)	New York Mets	[36]
	June	Josh Hader (8)	Houston Astros	David Bednar (2)	Pittsburgh Pirates	[37]
	July	Kenley Jansen (3)	Los Angeles Angels	Edwin Díaz (10)	New York Mets	[38]

See also

• Baseball portal

• Baseball awards
• List of MLB awards