By Sam Laskaris Writer The Six Nations Chiefs paid a price for some undisciplined play in the third period of their Major Series Lacrosse (MSL) contest on Wednesday versus the host Brooklin Lacrosse Club. The Chiefs held a commanding 9-4 lead in the third period of the match, held at the Iroquois Park Sports Complex in Whitby. But the Six Nations squad took five minor penalties in the final 20 minutes, while Brooklin had zero infractions. The hosts capitalized on a pair of powerplay opportunities in the final frame and with their momentum managed to make things interesting at the end, losing by a pair of goals, 9-7. “We took a couple of stupid penalties and let them back in it,” said Chiefs’ head coach John Tavares. “I thought we…