The Toronto Blue Jays joined the American League as an expansion franchise in 1977, and one year later, met the Expos for the first time in an exhibition contest, the first of an annual series that became known as the Pearson Cup. The Expos won that first game, 5–4, in front of 20,221 fans on June 29. Eight annual exhibitions (except for 1981 due to the strike) were played between 1978 and 1986 as each team won three games with two contests ending as ties. The teams did not meet again until 1997 with the advent of interleague play, and the first regular season meetings between the two. The games boosted attendance in both Montreal and Toronto, but the two teams failed to develop a serious rivalry.