On April 23, 1989 At Shea Stadium, Andre Dawson hits his 300th career homerun off Ron Darling in the top of the 7th inning. The blast gave the Cubs a 2-0 lead. The Mets will score 3 in the bottom of the 8th to win the contest. Dawson a year later on September 22, 1990 will steal his 300th base also
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Source: Historical record