Born: January 18, 1955|
|June 13, 1978, for the Chicago Cubs|
|Last MLB appearance|
|May 18, 1985, for the Seattle Mariners|
|Earned run average||4.01|
He made his major league debut with the Cubs on June 13, 1978, at Riverfront Stadium, pitching one relief inning against the Reds without allowing a baserunner. In March 1982, the Cubs traded Geisel to the Toronto Blue Jays to complete an earlier deal in which the Cubs sent a player to be named later to the Blue Jays for pitcher Paul Mirabella.
In the 1983 offseason, Geisel was selected by the Seattle Mariners from Toronto in the 1983 rule 5 draft. He pitched his final major league game on May 18, 1985, at Seattle's Kingdome in a victory over the visiting Baltimore Orioles.