Lot Detail - 1990 Gregg Jefferies New York Mets Game-Used & Autographed Home Jersey (JSA)
Trouble With the Curve Trouble with the Curve
Greg Jefferies: Late 1980's Mets Infielder (1987-1991)
The story of Billy Martin, not the one you think
Tubbs Baseball Blog: Gregg Jefferies' Unique Feat of Drawing Rookie of the Year Votes in Two Different Seasons
St. Thomas Eagles' Nest Fall 2019 by STHCatholic - Issuu
John Racanelli – SABR's Baseball Cards Research Committee
History of the New York Mets - Wikipedia
Trouble With the Curve Trouble with the Curve
Mets Morning (PDT) News: Mets go scoreless for first time in 2022 - Amazin' Avenue
Greg Jefferies: Late 1980's Mets Infielder (1987-1991)
Trouble with the Curve A baseball card hobby blog…
Matt Williams Price List - Supercollector Catalog