Koosman was on the mound for the final out of the 1969 World Series, having won both of his starts to help the Mets to their improbable championship. He was a fine pitcher in the post-season, posting a perfect 4-0 record with 31 K's in 40 1/3 innings. Koosman was the left-handed complement to righty Tom Seaver on the Mets for more than a decade. He retired with 222 wins and more than 2,500 strikeouts. Jerry Koosman hand signed this official MLB baseball. A Steiner Sports Certificate of Authenticity is included.
