JAX-RS not finding subresource locator

@Path("/event/{eventId: [0-9]+}")
public class EventAPI
{
    protected EventDescriptor dummyEvent = new EventDescriptor();

    @GET
    @Produces({"application/json", "text/xml"})
    public EventDescriptor getEvent(@PathParam("eventId") Integer eventId)
    {
        return this.dummyEvent;
    }
}

public class EventDescriptor
{
    protected Stuff stuffs = new Stuff();
    {
        // populate with participants
    }

    @GET
    @Produces({"application/json", "text/xml"})
    @Path("/{participantId}")
    public Stuff getStuffForParticipant(@PathParam("participantId") String participantId)
    {
        return this.stuffs.get(participantId);
    }
}