MyModule.cs

public class MyModule : NancyModule
{
    public MyModule()
    {
        Post["/scores"] = _ =>
        {
            var queries = this.Bind<IEnumerable<QueryParameters>>();
            
            return queries.Select(GetResult);
        }
        
        Get["/scores"] = args =>
        {
            var query = new QueryParameters
            {
                StartDate = args.startDate,
                EndDate = args.endDate,
                Team = args.team;
            }
            
            return GetResult(query);
        }
    }
    
    private Result GetResult(QueryParameters parameters)
    {
        // Get some results
    }
}

public class QueryParameters
{
    public DateTimeOffset StartDate { get; set; }
    
    public DateTimeOffset EndDate { get; set; }

    public string Team { get; set; }
}

public class Result
{
    // Watever you want to return here...
}

post.json

[{
    startDate: 01-04-2013,
    endDate: 01-05-2013,
    team: "Jets"
},
{
    startDate: 01-04-2013,
    endDate: 01-05-2013,
    team: "Cowboys"
}]