The Ginsberg and the Emaus of It

[G-Fafif]

Mets whose entire Mets careers were confined to a single April, with end date:

Joe Ginsberg 04/15/1962
Clem Labine 04/24/1962
Bobby Gene Smith 04/24/1962
Herb Moford 04/29/1962
Bart Shirley 04/29/1967
Rich Chiles 04/24/1973
Mac Scarce 04/11/1975
Luis Alvarado 04/13/1977
Ken Henderson 04/12/1978
Rick Sweet 04/29/1982
Mike Bishop 04/24/1983
Jonathan Hurst 04/21/1994
Dennis Springer 04/26/2000
Brian Rose 04/20/2001
Brett Hinchliffe 04/26/2001
McKay Christensen 04/07/2002
Felix Heredia 04/18/2005
Mike Matthews 04/24/2005
Chan Ho Park 04/30/2007
Gustavo Molina 04/30/2008
Darren O'Day 04/16/2009
Casey Fossum 04/26/2009
Blaine Boyer 04/10/2011
Brad Emaus 04/17/2011

Mets whose Mets careers weren't confined to a single April but ended in April, with end date:

Larry Burright 04/18/1964
Choo Choo Coleman 04/23/1966
Ralph Terry 04/22/1967
Ray Sadecki 04/23/1977
Tim Foli 04/18/1979
Mike Howard 04/05/1983
Ed Lynch 04/12/1986
Lou Thornton 04/24/1990
Andy Tomberlin 04/09/1997
Kevin Elster 04/12/1992
Bruce Chen 04/04/2002
Pete Walker 04/20/2002
Grant Roberts 04/18/2004
Victor Diaz 04/30/2006
Brady Clark 04/22/2008
Marlon Anderson 04/10/2009
Mike Jacobs 04/17/2010