Major daily fantasy sports sites are preparing its allies on fantasy sports legal battle in Maryland.

In preparation to the opening of Maryland General Assembly session on Jan. 13, two of the largest fantasy sports sites Fanduel and DraftKings have joined forces to mobilize players as officials look to determine whether or not the industry should be considered illegal gambling under Maryland law.

More than 100,000 Maryland residents who played in these fantasy sports sites have received an email urging them to support fantasy sports with Comptroller Peter Franchot.

“Your ability to continue playing fantasy sports in Maryland is at risk,” the email reads. “But it’s not too late. Let state Comptroller Peter Franchot know that Maryland residents want to continue playing fantasy sports. We support regulations that reasonably and fairly protect your right to continue enjoying the games you love. But some states have banned fantasy sports, and we are concerned that Maryland may be heading in that direction. ”