Mets to retire Keith Hernandez's Uniform #17 : r/NewYorkMets
Jerry Koosman number retirement set for June 13 - Amazin' Avenue
Mets retire Keith Hernandez's No. 17 in Citi Field ceremony
Mets to Retire Jerry Koosman's Jersey - The New York Times
Mets Editorial: How exclusive should number retirement be
Mets' next retired numbers prediction
BLOMBERG COLUMN: Childhood favorite Koosman, star of 'Miracle Mets
Jerry Koosman: NY Mets legend on jersey retirement, World Series
Mets retire Willie Mays' No. 24 as Old-Timers' Day returns
Mets should retire Jerry Koosman's number this year regardless of