Jerry Koosman's number retirement, 08/28/2021
Darryl Strawberry, Dwight Gooden to have numbers retired
Jerry Koosman Shares Stories on Mets 1969 World Series, Mets 70's Teams & Getting Jersey Retired
Jerry Koosman: NY Mets legend on jersey retirement, World Series
Mets retire Willie Mays' No. 24 as Old-Timers' Day returns - NBC Sports
Mets to retire Koosman's number — Queens Daily Eagle
Mets retire Willie Mays' No. 24 as Old-Timers' Day returns
With patience, home runs, and good luck, even the Mets can win a game - Amazin' Avenue
Keith Hernandez uniform No. 17 to be retired by NY Mets