The 1991 Upper Deck baseball card set was truly revolutionary and changed the hobby forever. With its sharp photography, attention to detail, and quality construction, 1991 Upper Deck set the standard that all other sports card manufacturers strive for to this day. Not surprisingly, many of the most valuable cards from that legendary set have stood the test of time and remain highly coveted by collectors decades later. Here’s a look at the 25 most valuable 1991 Upper Deck baseball cards based on PSA 10 Gem Mint condition:

Ken Griffey Jr. #1 – Griffey was already one of the game’s brightest young stars in 1991 and his iconic rookie card from Upper Deck is the crown jewel of the set. In a PSA 10 Gem Mint grade, it can fetch over $10,000 due to its extreme rarity and subject’s legendary career.

Nolan Ryan #57 – The “Ryan Express” was in the twilight of his career in 1991 but still one of baseball’s most intimidating hurlers. His action photo and Hall of Fame status make this a popular card. PSA 10s have sold for around $2,500.

Frank Thomas #235 – “The Big Hurt” was a rising star in 1991 and this card captured him at the peak of his powers. Thomas would go on to have one of the best careers of the 1990s. PSA 10s have reached $2,000.

Cal Ripken Jr. #91 – “Iron Man” Ripken was already a legend in 1991 for his consecutive games played streak. This card is iconic of his workmanlike approach. PSA 10s have sold for around $1,800.

Kirby Puckett #307 – The popular Puckett was in his prime in 1991 and helped lead the Twins to two World Series titles. PSA 10s of this card have sold for approximately $1,700.

Roger Clemens #213 – “Rocket” Clemens was one of baseball’s most dominant pitchers in the early 1990s. PSA 10s have reached $1,600.

Barry Bonds #173 – The young Bonds was already one of the game’s best players in 1991. His Hall of Fame career makes this an elite card. PSA 10s have sold for around $1,500.

Jose Canseco #1 – Canseco was the first player to hit 40 home runs and steal 40 bases in 1988, making him a huge star. His rookie card has sold for $1,400 in PSA 10 condition.

Ozzie Smith #307 – “The Wizard” was a fan favorite and one of the best defensive shortstops ever. PSA 10s have sold for approximately $1,300.

Rickey Henderson #307 – “Rickey” was the all-time stolen base king in 1991. His speed and talent resulted in cards valued near $1,200 in top condition.

Wade Boggs #307 – The hit machine Boggs was a mainstay for the Red Sox dynasty teams. PSA 10s have sold for around $1,100.

Tom Glavine #613 – Glavine had already established himself as an ace by 1991. He’d go on to 305 career wins and two Cy Young Awards. Near $1,000 value in PSA 10.

Greg Maddux #613 – Like Glavine, Maddux was already one of the game’s best pitchers in 1991. He’d win four Cy Youngs of his own in the 1990s. PSA 10s approach $1,000.

Dennis Eckersley #613 – “Eck” reinvented himself as a dominant closer in 1990. His changeup made him nearly unhittable. PSA 10s have reached $900.

Mark McGwire #613 – Big Mac was just starting to display his prodigious power in 1991. Little did anyone know he’d break the single season home run record. $850 PSA 10 value.

Don Mattingly #307 – The smooth swinging Mattingly was the face of the Yankees in the late 1980s. Injury troubles slowed him but not collectors, who value this card near $800 PSA 10.

Dave Stewart #613 – As an ace for the A’s dynasty teams, Stewart earned this spot. He tossed two World Series shutouts in 1989. $750 PSA 10 value.

Cecil Fielder #613 – The powerful Fielder hit 51 homers in 1990, making him a star. His prodigious power is reflected in the $700 PSA 10 price tag.

Bobby Thigpen #613 – Thigpen’s 57-save season in 1990 made him a closer sensation. This card has reached $650 in top grade.

Tom Seaver #307 – “Tom Terrific” was a legend by 1991 but still pitching. One of the best righthanders ever, this card sells for around $600 PSA 10.

Dave Winfield #307 – The smooth Winfield was still going strong in 1991 after a Hall of Fame career. $575 PSA 10 value.

George Brett #307 – Brett was winding down his career but still a fan favorite. His 1980s Royals teams made him a legend. $550 PSA 10 price.

Steve Carlton #307 – “Lefty” was a veteran but still among the career strikeout leaders. His long, great career earns this card $525 in top grade.

Nolan Ryan #307 – Another iconic Ryan photo, this time of him winding up. Fetches near $500 in pristine condition.

Orel Hershiser #613 – After his record 59 consecutive scoreless innings in 1988, Hershiser was one of the game’s best. A $475 PSA 10 price shows his enduring popularity.

The 1991 Upper Deck baseball set broke new ground with its quality and photography. Not surprisingly, many of its stars like Griffey Jr., Ripken, and Bonds have become the most valuable modern rookie cards in the hobby due to their incredible careers. Even lesser stars hold value due to the set’s prestige. Over 30 years later, 1991 Upper Deck remains the pinnacle that other sports card issues are judged by.