Marriott has turned to Baker & Hostetler to represent the hotel chain in a growing number of class actions brought over its massive data breach.

On Tuesday, Baker & Hostetler's Daniel Warren, a partner in Cleveland, filed a court appearance to represent Marriott before the U.S. Judicial Panel on Multidistrict Litigation, which is hearing arguments on Jan. 31 in Miami over whether to coordinate the cases spurred by the event. Lawyers have filed about 50 class actions since the breach, which compromised personal information such as the passport numbers of 500 million guests of Marriott's Starwood properties.

Marriott so far has not responded to allegations in the lawsuits that its negligence caused the breach.