1978 Topps #339 Mario Guerrero
About Mario Guerrero
The Angels still carry Guerrero on card #339, though the 1977 season behind it was his last there: 86 games, a .283 average and 28 RBI. He became a free agent and signed with the Giants on December 15, then was sent to Oakland on April 7, 1978, to complete the Vida Blue trade.
Mario Guerrero was a Dominican shortstop who played 697 major league games from 1973 to 1980 for the Red Sox, Cardinals, Angels and Athletics, hitting .257 with 7 home runs. The Yankees signed him in 1968, and he went to Boston on June 30, 1972, as the player to be named later in the Sparky Lyle trade for Danny Cater. He debuted on April 8, 1973, and in 1974 shared shortstop with Rick Burleson. A trade to St. Louis in April 1975 and another to California in 1976 followed, and he hit .284 for the Angels that year. His busiest season was 1978 with Oakland, when he played 143 games and drove in a career-high 38 runs. He played all 116 games of 1980 at shortstop for Oakland, and Seattle released him in spring training 1981. His brother Epy was a noted Blue Jays scout, and Mario later worked as a player agent and helped at Epy's academy near Santo Domingo. He died on July 2, 2023.
Sources: Wikipedia · SABR BioProject · Baseball-Reference
Graded population (PSA & SGC)
| Grader | Total | 10 | 9 | 8 | 7 | 6 | 5 | 1-4 | Auth |
|---|---|---|---|---|---|---|---|---|---|
| PSA | 144 | 36 | 80 | 22 | 4 | 1 | 1 | 0 | 0 |
| SGC | 3 | 0 | 2 | 0 | 1 | 0 | 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: #214 California Angels Team
More California Angels cards:
- #6 Nolan Ryan
- #18 Bob Grich
- #48 Don Baylor
- #71 Terry Humphrey
- #115 Gary Nolan
- #150 Bobby Bonds
- #178 Dave Chalk
- #206 1977 Strikeout Leaders
- #207 1977 ERA Leaders
- #239 Dyar Miller
- #268 Gil Flores
- #291 Gary Ross
- #313 Andy Etchebarren
- #368 Balor Moore
Frequently asked questions
What is the 1978 Topps #339 card?
It is card #339 of the 726-card 1978 Topps Baseball set, picturing Mario Guerrero of the California Angels.
How many cards are in the 1978 Topps Baseball set?
726 cards, numbered 1 through 726 with none skipped and issued as a single series, and 728 collectible states: #23 Bump Wills comes with or without a black circle, and #374 Jose Morales with or without black stitching over the red laces, so the master set counts both states of each.
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.