EXHIBIT 99.1

This Statement on Form 4 is filed jointly by the Reporting Persons listed below. The principal business address of each of these Reporting Persons is 333 South Grand Avenue, 28th Fl., Los Angeles, CA 90071.

Name of Designated Filer: OAKTREE VALUE OPPORTUNITIES FUND HOLDINGS, L.P.

Date of Event Requiring Statement: January 9, 2014

Issuer Name and Ticker or Trading Symbol: XCO

	OAKTREE VALUE OPPORTUNITIES FUND HOLDINGS, L.P.

	By: Oaktree Value Opportunities Fund GP, L.P.
	Its: General Partner

	By: Oaktree Value Opportunities Fund GP Ltd.
	Its: General Partner

	By: Oaktree Capital Management, L.P.
	Its: Director

	By:	/s/ Lisa Arakaki
	Name: Lisa Arakaki
	Title: Managing Director

	By:	/s/ Martin Boskovich
	Name: Martin Boskovich
	Title: Managing Director


	OAKTREE VALUE OPPORTUNITIES FUND GP, L.P.

	By: Oaktree Value Opportunities Fund GP Ltd.
	Its: General Partner

	By: Oaktree Capital Management, L.P.
	Its: Director

	By:	/s/ Lisa Arakaki
	Name: Lisa Arakaki
	Title: Managing Director

	By:	/s/ Martin Boskovich
	Name: Martin Boskovich
	Title: Managing Director

	OAKTREE VALUE OPPORTUNITIES FUND GP LTD.

	By: Oaktree Capital Management, L.P.
	Its: Director

	By:	/s/ Lisa Arakaki
	Name: Lisa Arakaki
	Title: Managing Director

	By:	/s/ Martin Boskovich
	Name: Martin Boskovich
	Title: Managing Director


	OAKTREE FUND GP I, L.P.

	By:	/s/ Lisa Arakaki
	Name: Lisa Arakaki
	Title: Authorized Signatory

	By:	/s/ Martin Boskovich
	Name: Martin Boskovich
	Title: Authorized Signatory

	OAKTREE CAPITAL I, L.P.

	By: OCM Holdings I, LLC
	Its: General Partner

	By:	/s/ Lisa Arakaki
	Name: Lisa Arakaki
	Title: Managing Director and Assistant Secretary

	By:	/s/ Martin Boskovich
	Name: Martin Boskovich
	Title: Senior Vice President and Assistant Secretary

	OCM HOLDINGS I, LLC

	By:	/s/ Lisa Arakaki
	Name: Lisa Arakaki
	Title: Managing Director

	By:	/s/ Martin Boskovich
	Name: Martin Boskovich
	Title: Senior Vice President

	OAKTREE HOLDINGS, LLC

	By: Oaktree Capital Group, LLC
	Its: Managing Member

	By:	/s/ Lisa Arakaki
	Name: Lisa Arakaki
	Title: Managing Director

	By:	/s/ Martin Boskovich
	Name: Martin Boskovich
	Title: Senior Vice President

OAKTREE HOLDINGS, LLC 4