The 32-year-old Stoll was arrested Friday afternoon after security guards conducting a routine search to enter the MGM Grand hotel's Wet Republic pool complex found what investigators believe to be 3.3 grams of cocaine and several capsules in the back pocket of his shorts, according to a police arrest report made public Monday.
Police are testing the powder and the capsules of what investigators suspect is MDMA, also known as Ecstasy. Combined, police put the value of the drugs at about $600.
Stoll's lawyer, David Chesnoff, was unavailable Monday for immediate comment. Chesnoff said Saturday he hoped the public wouldn't prejudge his client.
Stoll was released on $5,000 bond late Friday from the Clark County jail in Las Vegas.
His July 1 court date in Las Vegas will be on the same day the 12-year NHL veteran becomes an unrestricted free agent.
Kings spokesman Jeff Moeller declined to comment Monday.
Stoll is a two-time Stanley Cup winner and has been dating Fox Sports reporter Erin Andrews since late 2012.
The Kings missed the playoffs this season, and players went home for the summer a week ago.