on the uniform. Rivalries Montreal Expos The Montreal Expos were the Blue Jays' geographic National League rival, being the other Canadian MLB team before it was relocated. From 1978 to 1986, the teams played an annual mid-season exhibition game, known as the Pearson Cup, named after former Prime Minister Lester B. Pearson. The teams began facing each other in the regular season in 1997, with the advent of interleague play. During the 2003 and 2004 seasons, the Expos' last two seasons before relocating to Washington, D.C., as the Nationals, the Pearson Cup was awarded after a pair of three-game sets. Detroit Tigers The Detroit Tigers are the Blue Jays' geographic and traditional rival, dating back to the 1980s, when the teams were AL East contenders. The Tigers moved to the AL Central in 1998, and the rivalry has died down as a result, with the teams facing each other only six to seven times per year since 2011. Depending on traffic and border delays, Detroit is about a four-hour drive from Toronto. According to The Detroit News, a July 2017 three-game series at Comerica Park against the Blue Jays drew a season-best-to-date total attendance of 115,088. Seattle Mariners Although the Seattle Mariners are not a divisional rival, many Blue Jays fans from Western Canada travel to Seattle when the Blue Jays play there as Seattle is geographically closer to Western Canada than Toronto is. Depending on traffic and border delays, Seattle is about a three-hour drive from Vancouver. The Seattle Times estimated that Blue Jays fans represented around 70 percent of the crowd in Safeco Field for a June 2017 weekend series. Broadcasting Radio The Blue Jays' former radio play-by-play announcer, Tom Cheek, called every Toronto Blue Jays game from the team's inaugural contest on April 7, 1977, until June 3, 2004, when he took two games off following the death of his father—a streak of 4,306 consecutive regular-season games and 41 postseason games. Cheek later died on October 9, 2005, and the team commemorated him during their 2006 season by wearing a circular patch on the left sleeve of their home and road game jerseys. The patch was adorned with the letters 'TC', Cheek's initials, as well as a stylized microphone. Cheek is also honoured with a place in the Blue Jays' "Level of Excellence" in the upper level of the Rogers Centre; the number 4,306 is depicted beside