Exhibit A

JOINT FILING AGREEMENT

Pursuant to and in accordance with the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder (the “Exchange Act”) the undersigned hereby agree to the joint filing of GSO Special Situations Fund LP, GSO SSOMF Locomotive Blocker Ltd., Steamboat Locomotive Blocker Ltd., GSO ADGM Locomotive Blocker Ltd., GSO Cactus Credit Opportunities Fund LP, GSO Churchill Partners LP, GSO Coastline Credit Partners LP, GSO Credit-A Partners LP, GSO Palmetto Opportunistic Investment Partners LP, GSO Special Situations Overseas Master Fund Ltd., Steamboat Credit Opportunities Intermediate Fund LP, GSO Aiguille des Grands Montets Fund I LP, GSO Aiguille des Grands Montets Fund II LP, GSO Aiguille des Grands Montets Fund III LP, GSO Credit Alpha Fund AIV-2 LP, GSO Churchill Associates LLC, GSO Credit-A Associates LLC, GSO Palmetto Opportunistic Associates LLC, GSO Credit Alpha Associates LLC, GSO Holdings I L.L.C., Blackstone Holdings I L.P., Blackstone Holdings II L.P., GSO Capital Partners LP, GSO Advisor Holdings L.L.C., Blackstone Holdings I/II GP Inc., The Blackstone Group L.P., Blackstone Group Management L.L.C., Stephen A. Schwarzman, Bennett J. Goodman and J. Albert Smith III, on behalf of each of them of any filing required by such party under Section 13 or Section 16 of the Exchange Act or any rule or regulation thereunder (including any amendment, restatement, supplement, and/or exhibit thereto) with respect to shares of Common Stock of Warrior Met Coal, Inc., a Delaware corporation, and further agree to the filing, furnishing, and/or incorporation by reference of this Agreement as an exhibit thereto. This Agreement shall remain in full force and effect until revoked by any party hereto in a signed writing provided to each other party hereto, and then only with respect to such revoking party. This Agreement may be executed in any number of counterparts all of which taken together shall constitute one and the same instrument.

Dated: April 11, 2018

GSO SPECIAL SITUATIONS FUND LP
	By: GSO Capital Partners LP, its investment manager
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
GSO SSOMF LOCOMOTIVE BLOCKER LTD.
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
STEAMBOAT LOCOMOTIVE BLOCKER LTD.
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory

[Warrior Met Coal, Inc. – Joint Filing Agreement]

GSO ADGM LOCOMOTIVE BLOCKER LTD.
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
GSO SPECIAL SITUATIONS OVERSEAS MASTER FUND LTD.
	By: GSO Capital Partners LP, its investment manager
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
GSO PALMETTO OPPORTUNISTIC INVESTMENT PARTNERS L.P.
	By: GSO Palmetto Opportunistic Associates LLC, its general partner
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
GSO CREDIT-A PARTNERS L.P.
	By: GSO Credit-A Associates LLC, its general partner
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
STEAMBOAT CREDIT OPPORTUNITIES INTERMEDIATE FUND LP
	By: GSO Capital Partners LP, its investment manager
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory

[Warrior Met Coal, Inc. – Joint Filing Agreement]

GSO COASTLINE CREDIT PARTNERS L.P.
	By: GSO Capital Partners LP, its investment manager
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
GSO CACTUS CREDIT OPPORTUNITIES FUND LP
	By: GSO Capital Partners LP, its investment advisor
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
GSO AIGUILLE DES GRANDS MONTETS FUND I LP
	By: GSO Capital Partners LP, its investment manager
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
GSO AIGUILLE DES GRANDS MONTETS FUND II LP
	By: GSO Capital Partners LP, its investment manager
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
GSO AIGUILLE DES GRANDS MONTETS FUND III LP
	By: GSO Capital Partners LP, its investment manager
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory

[Warrior Met Coal, Inc. – Joint Filing Agreement]

GSO CHURCHILL PARTNERS LP
	By: GSO Capital Partners LP, its investment advisor
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
GSO CREDIT ALPHA FUND AIV-2 LP
	By: GSO Credit Alpha Associates LLC, its general partner
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
GSO CHURCHILL ASSOCIATES LLC
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
GSO CREDIT-A ASSOCIATES LLC
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
GSO PALMETTO OPPORTUNISTIC ASSOCIATES LLC
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
GSO CREDIT ALPHA ASSOCIATES LLC
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
GSO HOLDINGS I L.L.C.
By:	/s/ John G. Finley
Name:	John G. Finley
Title:	Chief Legal Officer

[Warrior Met Coal, Inc. – Joint Filing Agreement]

GSO CAPITAL PARTNERS LP
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Authorized Signatory
GSO ADVISOR HOLDINGS L.L.C.
	By: Blackstone Holdings I L.P., its sole member
	By: Blackstone Holdings I/II GP Inc., its general partner
By:	/s/ John G. Finley
Name:	John G. Finley
Title:	Chief Legal Officer
BLACKSTONE HOLDINGS I L.P.
	By: Blackstone Holdings I/II GP Inc., its general partner
By:	/s/ John G. Finley
Name:	John G. Finley
Title:	Chief Legal Officer
BLACKSTONE HOLDINGS II L.P.
	By: Blackstone Holdings I/II GP Inc., its general partner
By:	/s/ John G. Finley
Name:	John G. Finley
Title:	Chief Legal Officer
BLACKSTONE HOLDINGS I/II GP INC.
By:	/s/ John G. Finley
Name:	John G. Finley
Title:	Chief Legal Officer
THE BLACKSTONE GROUP L.P.
	By: Blackstone Group Management L.L.C., its general partner
By:	/s/ John G. Finley
Name:	John G. Finley
Title:	Chief Legal Officer

[Warrior Met Coal, Inc. – Joint Filing Agreement]

BLACKSTONE GROUP MANAGEMENT L.L.C.
By:	/s/ John G. Finley
Name:	John G. Finley
Title:	Chief Legal Officer
STEPHEN A. SCHWARZMAN
By:	/s/ Stephen A. Schwarzman
Name:	Stephen A. Schwarzman
BENNETT J. GOODMAN
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Attorney-in-Fact
J. ALBERT SMITH III
By:	/s/ Marisa Beeney
Name:	Marisa Beeney
Title:	Attorney-in-Fact

[Warrior Met Coal, Inc. – Joint Filing Agreement]