1979 Topps #366 Juan Bernhardt
About Juan Bernhardt
Bernhardt started 1978 at Triple-A San Jose and returned to the Mariners on May 12. He played 54 games for Seattle that season and hit .230. He had 2 home runs and 12 RBI. He played 25 games at first base and 22 at third. In 1979 the Mariners sent him to Spokane, where he hit .271 in 98 games. His 1979 Topps card is #366 and carries the Mariners.
Juan Bernhardt was a Dominican infielder and designated hitter who played parts of four major league seasons, 1976 with the New York Yankees and 1977 to 1979 with the Seattle Mariners. He signed with the Yankees in August 1970 and led the Eastern League in batting in 1975 while with West Haven. The Yankees called him up in July 1976, and he debuted on July 10 against the White Sox. Seattle selected him in the 1976 expansion draft, and on Opening Day 1977 he went 5-for-5 with a home run, the first in Mariners history. His last major league appearance came on April 8, 1979, a hit in his only at-bat. Seattle traded him to the White Sox for Rich Hinton that July, and he played in the Mexican League from 1980 to 1983, serving as player-manager of Campeche in 1981 and 1982. His major league totals were a .238 average, 9 home runs and 43 RBI.
Sources: Wikipedia · Baseball-Reference
Graded population (PSA & SGC)
| Grader | Total | 10 | 9 | 8 | 7 | 6 | 5 | 1-4 | Auth |
|---|---|---|---|---|---|---|---|---|---|
| PSA | 45 | 8 | 26 | 6 | 2 | 0 | 1 | 2 | 0 |
| SGC | 2 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 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: #659 Seattle Mariners / Darrell Johnson
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- #166 Leon Roberts
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- #312 Bob Robertson
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Frequently asked questions
What is the 1979 Topps #366 card?
It is card #366 of the 726-card 1979 Topps Baseball set, picturing Juan Bernhardt of the Seattle Mariners.
How many cards are in the 1979 Topps Baseball set?
726 cards, numbered 1 through 726 with none skipped and issued as a single series, tracked as 727 collectible states: #369 Bump Wills comes with a Rangers or a Blue Jays team banner, and the master set counts both.
Sources: Trading Card Database, PSA, 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.