Baseball Card Breakdown: March 2019
Mets Morning News: Jegg Grefferies - Amazin' Avenue
Baseball Card Breakdown: March 2019
Gregg Jefferies: Best late season call up ever – Mets360
Can someone explain to me what the hype behind Gregg Jefferies was? : r/baseball
Where are they now?: Gregg Jefferies — College Baseball, MLB Draft, Prospects - Baseball America
New York Mets Gregg Jeffries Sports Illustrated Cover by Sports Illustrated
baseball Pop Culture Affidavit
Baseball Card Breakdown: March 2019