Exhibit 23.1


CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation Betfredby reference in this Registration Statement on Form S-3 of our reports dated February 9, 2017, relating betfred sportsbookto the consolidated financial statements and financial statement schedule of Cliffs Natural Resources Inc. and subsidiaries, betfred sportsbook reviewand the effectiveness of Cliffs Natural Resources Inc.’s internal control over financial reporting, appearing in betfred sportsbook reviewthe Annual Report on Form 10-K of Cliffs Natural Resources Inc. for the year ended December 31, 2016, and to betfred gamesthe reference to us under the heading "Experts" in the prospectus, which is part of this Registration Statement.

/s/ DELOITTE & TOUCHE LLP

Cleveland, Ohio
February 9, 2017