import re

texts = ['03-23-27-34-37, Mega Ball: 13', '01-12 + 08-20', '04-15-17-25-41']
reg = re.compile(r'^(?:[^\w,]*\d+)+')

for text in texts:
    match = reg.search(text)
    if match:
        print( text, '=>', list(map(int,re.findall(r'\d+', match.group()))) )