1966 Topps #558 Red Sox Rookie Stars - Guido Grilli / Pete Magrini / George Scott
On this card: Guido Grilli, Pete Magrini, George Scott
About this card
The 46 Rookie Stars cards group a club's prospects under one number - except #553, which mixes Braves and Angels, and #591 NL Rookie Stars, which mixes Dodgers and Phillies. The class is headlined by #254 (Ferguson Jenkins, with Bill Sorrell) and #288 (Don Sutton, with Bill Singer).
The story on this card
Grilli reached the majors in 1966 with the Boston Red Sox after nearly eight years in their farm system. Card #558 is a high number from the set's seventh series, part of a multi-player Rookie Stars subset shared with Pete Magrini and George Scott, with Grilli pictured as a Red Sox rookie. It stands as his recognised rookie card. A Memphis-born left-hander who spent nearly eight years working through the Red Sox farm system before a brief 1966 stint in the majors with Boston and Kansas City.
Magrini's rookie season opened with his major league debut on April 13, 1966 against Baltimore, relieving Dave Morehead and working the final two innings. He pitched briefly again in relief before Boston gave him a start at Kansas City on May 9, his only big-league start and his only decision, a 6-1 loss. Boston optioned him to Toronto the next day. This card shares its Rookie Stars panel with fellow pitcher Guido Grilli and infielder George Scott, Magrini's Pittsfield teammate and the 1965 Eastern League Triple Crown winner. It falls in the set's seventh and final print series, among the high numbers, and stands as Magrini's rookie card. A Santa Clara product who once struck out Willie Mays in an exhibition game, Pete Magrini reached the majors with Boston in 1966 after an 18-8, 2.26 ERA season at Double-A Pittsfield.
Card #558 is a high-number Rookie Stars multi-player card from Topps' final 1966 series, pairing Scott with fellow Red Sox prospects Guido Grilli and Pete Magrini. It is recognized as Scott's rookie card. That season he took over first base a week into his debut, played all 162 games, hit .245 with 27 home runs and 90 RBIs, and earned an All-Star selection as a Red Sox rookie. Boston and Milwaukee first baseman with a rifle glove and a big personality, Scott won eight Gold Gloves, made three All-Star teams, and led the American League in homers and RBIs for the 1975 Brewers.
Sources: Wikipedia (Pete Magrini) · Wikipedia (George Scott (first baseman)) · SABR BioProject (Guido Grilli) · SABR BioProject (Pete Magrini)
Graded population (PSA & SGC)
| Grader | Total | 10 | 9 | 8 | 7 | 6 | 5 | 1-4 | Auth |
|---|---|---|---|---|---|---|---|---|---|
| PSA | 673 | 6 | 56 | 267 | 177 | 91 | 45 | 28 | 3 |
| SGC | 98 | 0 | 2 | 33 | 34 | 15 | 9 | 5 | 0 |
Graded population — a scarcity guide, not a price. Data as of 2026-09-04. Half grades fold down for both graders (8.5→8); PSA qualified slabs (OC, ST, PD, MC and the like) are not counted. Where SGC registers no separate row for a variation state, its slabs of that card are listed under the base state.
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Related cards
Team card: #259 Boston Red Sox
More Boston Red Sox cards:
- #6 Chuck Schilling
- #37 Billy Herman
- #53 Bob Duliba
- #70 Carl Yastrzemski
- #93 Jim Lonborg
- #114 Jim Gosger
- #135 Dave Morehead
- #178 Bob Tillman
- #203 Jose Santiago
- #216 American League 1965 Batting Leaders
- #218 American League 1965 Home Run Leaders
- #227 Russ Nixon
- #277 George Thomas
- #298 Rico Petrocelli
Frequently asked questions
What is the 1966 Topps #558 card?
It is card #558 of the 598-card 1966 Topps Baseball set, picturing Guido Grilli, Pete Magrini and George Scott. The 46 Rookie Stars cards group a club's prospects under one number - except #553, which mixes Braves and Angels, and #591 NL Rookie Stars, which mixes Dodgers and Phillies. The class is headlined by #254 (Ferguson Jenkins, with Bill Sorrell) and #288 (Don Sutton, with Bill Singer).
Is 1966 Topps #558 a rookie card?
Yes - #558 is a rookie card for every player pictured on it: Guido Grilli, Pete Magrini and George Scott.
Why is #558 harder to find?
It is a high number card from the seventh and last print series, #523-598 - the scarce end of the set. Forty-three of its 76 cards are short prints, so scarcity is stated for the series as a whole.
How many cards are in the 1966 Topps Baseball set?
598 cards, tracked as 613 collectible states. Numbers run from 1 to 598 with no gaps and no number used twice, and 14 cards carry catalogued print variations - five checklists, the trade and sold statement backs, the three-state #43 Don Landrum, three team-card dot pairs and the #161 Jerry Lumpe white streak - that the master set counts separately.
Sources: Trading Card Database, PSA CardFacts, 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 2026-10-11.