Apprentice rider Silvia Zapico broke five ribs and her right ankle in a Friday spill at Laurel Park, according to her agent, Kevin Witte.
The 27-year-old was injured when her mount, Smart N Smokin, ran into the rail, dumped the rider and then kicked her in the ribs.
Zapico rode as an amateur in Europe before turning professional in August.
She won four races at Finger Lakes, then relocated to Maryland during the Timonium State Fair meet.
She is 3-for-55 at the current Laurel Park fall stand.
Witte indicated there is no timetable for her return.
Russell moves ahead