Code Kata - Football

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;

namespace Code_Katas
{
    public class Football
    {
        public static string FindTeamWithSmallestDifference3(string fileName)
        {
            var data = File.OpenText(fileName).ReadToEnd();

            int currentLeastDifference = int.MaxValue;
            string currentLeastDifferenceTeam = String.Empty;

            var onlyData = data.Split(new[] { '\n' }, StringSplitOptions.RemoveEmptyEntries)
                .Where(r => char.IsNumber(r.TrimStart()[0]));

            foreach (var item in onlyData)
            {
                var dataOfTeam = item.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);

                var difference = Math.Abs(int.Parse(dataOfTeam[6]) - int.Parse(dataOfTeam[8]));
                if (difference < currentLeastDifference)
                {
                    currentLeastDifference = difference;
                    currentLeastDifferenceTeam = dataOfTeam[1];
                }
            }

            return currentLeastDifferenceTeam;
        }
    }
}