RegEX

import re

string = '''Love, Kenneth: 20
Chalkley, Andrew: 25
McFarland, Dave: 10
Kesten, Joy: 22
Stewart Pinchback, Pinckney Benton: 18'''

players = re.search(r'''
  (?P<last_name>[\w ]*)
  ,\s
  (?P<first_name>[\w ]*)
  :\s
  (?P<score>[\d]*)
''', string, re.X | re.M)


class Player:
     def __init__(self, **kwargs):
            for key, value in kwargs.items():
                if key = "first_name":
                    self.first_name = value
                elif key = "last_name":
                    self.last_name = value
                elif key = "score":
                    self.score = value