Maryland casinos generated $76 million in revenue in July, an increase of 9.7 percent compared to the same period a year earlier, the Maryland Lottery and Gaming Control Agency said Tuesday.

Maryland Live! in Hanover, Md., the third largest commercial casino in the nation, led the state’s four casinos with revenues of $58.2 million.

But the biggest success story for the month may be Rocky Gap Casino Resort, which posted $4.2 million in revenue for July, a jump of 19.7 percent compared to July 2013.

Hollywood Perryville had the toughest month, reporting $7.5 million in revenue for July, down .1 percent compared to July 2013.

Casino at Ocean Downs reported $6 million in revenue, an increase of 4.6 percent compared to July 2013.

As of June, Maryland Live! had 81 percent market share, according to the University of Nevada, Las Vegas’s Center for Gaming Research. The Arundel Mills casino will try to hold on to as much of that as possible that after Horseshoe Baltimore, a.k.a., “The Legend,” opens  Aug. 26. The two-story casino is expected to be somewhat smaller than Maryland Live! with 100 table games and 2500 slots. Maryland Live, by contrast, operates 4,222 slot machines and 189 table games.