On June 25, 1973, the San Francisco Giants activate pitching coach Don McMahon. Remarkably, the 43-year-old will go 4-0 with six saves and a spectacular ERA of 1.48. Despite his surprising success as a reliever, the Giants will release McMahon on October 9. @ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50Ijo
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Source: Historical record