Greg Jefferies: Late 1980's Mets Infielder (1987-1991)
MMO Exclusive: Former Met, Gregg Jefferies - Metsmerized Online
Tubbs Baseball Blog: Gregg Jefferies' Unique Feat of Drawing
Meeting Gregg Jefferies
Big-name free agents Lance Parrish and Gregg Jefferies didn't work
Phillies cycle history
Gregg Jefferies Hits for the Cycle in 1995
Gregg Jefferies Original Autographed Baseball MLB Balls for sale
Philadelphia Phillies: The 5 Worst Free-Agent Signings in
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Gregg Jefferies Autographed 1989 Donruss #35
Gregg Jefferies: Best late season call up ever – Mets360
Gregg Jefferies Original Autographed Baseball MLB Balls for sale
An oral history of my card collection (as told by the cards) - The
Gregg Jefferies: Best late season call up ever – Mets360
Mets Top 10 Prospects Vault: Thirty Years Later