1977 Topps #300 Jerry Koosman
About Jerry Koosman
Koosman's 1977 Topps card, #300, shows him with the Mets. It followed a 1976 in which he worked 247 1/3 innings with a 2.69 ERA and 17 complete games. In 1977 the club traded Tom Seaver to the Reds, and Koosman fell to 8-20 with a 3.49 ERA, tied with Phil Niekro for the most losses in the league.
Jerry Koosman pitched 19 major league seasons (1967-1985) for the New York Mets, Minnesota Twins, Chicago White Sox and Philadelphia Phillies, finishing 222-209 with a 3.36 ERA and 2,556 strikeouts. A Minnesota farm kid, he was pitching for an Army team at Fort Bliss, Texas, when his catcher's father, a Shea Stadium usher, passed word to Mets farm director Joe McDonald, and Koosman signed in 1964 for a $1,600 bonus. A slider learned from instructor Frank Lary kept him in the organization, and in 1968 the hard-throwing left-hander went 19-12 with a 2.08 ERA, setting franchise records and finishing one vote behind Johnny Bench for National League Rookie of the Year. He made the All-Star team in 1968 and 1969, and in 1969 he pitched behind Tom Seaver as the Mets won the World Series, winning two games against Baltimore. He won 21 games for the Mets in 1976 and 20 for the Twins in 1979 before closing out with Chicago and Philadelphia. The Mets inducted him into their team hall of fame in 1989 and retired his number 36 in 2021.
Sources: Wikipedia · SABR BioProject · Baseball-Reference
Graded population (PSA & SGC)
| Grader | Total | 10 | 9 | 8 | 7 | 6 | 5 | 1-4 | Auth |
|---|---|---|---|---|---|---|---|---|---|
| PSA | 131 | 19 | 53 | 41 | 9 | 4 | 2 | 3 | 0 |
| SGC | 8 | 1 | 0 | 4 | 1 | 0 | 1 | 1 | 0 |
Graded population — a scarcity guide, not a price. Data as of 2026-10-19. Half grades fold down for both graders (8.5→8); PSA qualified slabs (OC, ST, PD, MC and the like) are not counted.
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Related cards
Team card: #259 New York Mets Team
More New York Mets cards:
- #6 1976 Strikeout Leaders
- #44 Bud Harrelson
- #65 Skip Lockwood
- #94 Craig Swan
- #119 John Stearns
- #150 Tom Seaver
- #172 John Milner
- #201 Ed Kranepool
- #225 Bob Apodaca
- #246 Mike Vail
- #281 Roy Staiger
- #329 Ron Hodges
- #352 Mike Phillips
- #376 Nino Espinosa
Frequently asked questions
What is the 1977 Topps #300 card?
It is card #300 of the 660-card 1977 Topps Baseball set, picturing Jerry Koosman of the New York Mets.
How many cards are in the 1977 Topps Baseball set?
660 cards, numbered 1 through 660 with none skipped and distributed as a single series. No card carries a catalogued print variation, so the base set and the master set are the same 660 cards.
Sources: Trading Card Database, PSA CardFacts, BaseballCardPedia, Cardboard Connection, Baseball Almanac, Baseball-Reference, the SABR BioProject and the National Baseball Hall of Fame, PSA & SGC population reports. Card data compiled and maintained by T206Cards.com. Page last updated 2026-10-25.