The 1990 baseball card season marked the beginning of careers for many all-time great players. While they were only prospects at the time of these early cards, some key pre-rookie cards from 1990 can hold significant value for collectors today depending on the player and the card’s condition. Let’s take a closer look at some of the more valuable 1990 pre-rookie cards collectors may want to be on the lookout for.

Frank Thomas (1990 Fleer Rookie Recognition #15): Frank Thomas is considered one of the best right-handed hitters of all time. His dominance began immediately as a rookie in 1991 where he finished second in AL MVP voting. This 1990 Fleer card, which shows Thomas in a White Sox batting stance, carries a Beckett NM-MT 7 value of $60 alone. A PSA 10 Gem Mint version of this key Frank Thomas pre-rookie card recently sold for over $1,000 showing there is big upside potential for high grade examples.

Chipper Jones (1990 Bowman #234): Drafted #1 overall in the 1990 MLB Draft by the Atlanta Braves, Chipper Jones went on to have a Hall of Fame career largely spent with the Braves. He was ROY in 1995 and NL MVP in 1999. This 1990 Bowman card shows Jones as a prospect in a Braves batting stance. PSA 10 Gems recently sold in the $500 range while PSA 9s bring over $100, demonstrating this to be one of the more valuable 1990 pre-rooke cards.

Derek Jeter (1990 Bowman #156): As arguably the greatest Yankee of all time and surefire Hall of Famer, Derek Jeter’s early 1990 Bowman card is a must-have for collectors. This card features a teenage Jeter in a Turnstile Grady uniform. PSA 10 Gems have sold for over $3,000 in recent years while PSA 9s still pull in several hundred dollars. Jeter’s star power and pedigree make this one of the crown jewels for 1990 pre-rookie cards.

Kenny Lofton (1990 Bowman #648): Kenny Lofton carved out a 17-year career as a speedy center fielder who was a key member of several contending teams. He showed star potential early as evidenced by this 1990 Bowman card showing Lofton suited up for the Houston Astros organization before being traded. PSA 10s have sold for $500+ in recent years with PSA 9s bringing $100-200.

Jim Thome (1990 Bowman #91): Often lost among the stars of the 1990s was Jim Thome, one of the most powerful right-handed hitters ever. This early 1990 Bowman card shows Thome as a young power prospect in the White Sox system.gem PSA 10 versions have topped $400 at auction recently, with PSA 9s trading at $100-150 as well, indicating strong collector demand for one of the game’s true 500+ home run legends.

Curt Schilling (1990 Bowman #643): “Bloody Sock” Curt Schilling emerged as one of the most dominant postseason pitchers ever during his career largely with the Diamondbacks and Red Sox. This pre-rookie card shows him in an Expos uniform. PSA 10 copies have reached $400 while PSA 9s trade around $150.

Greg Maddux (1990 Bowman Update #22): Considered one of the best pitching performances ever, Greg Maddux piled up 355 career wins and 4 Cy Young Awards. This early 1990 Update card features Maddux as a youngster in the Cubs system. PSA 10s have brought as much as $500 in recent sales with PSA 9s in the $150-250 range, impressive for a pre-rookie card of a legend.

Gary Sheffield (1990 Bowman #674): “Sheff” forged a 22-year career as a feared power hitter and 5-time All-Star, 3-time Silver Slugger winner during which he smacked 509 home runs. This Bowman card exhibits Sheffield’s tools prior to debuting for the Brewers in 1988. High grade PSA 10s have sold for around $300.

Sandy Alomar Jr. (1990 Donruss #153): Though overshadowed by bigger star contemporaries, Sandy Alomar Jr. enjoyed a long, productive career primarily with the Indians where he was a 6x All-Star and valuable catcher/DH. PSA 10s of this pre-rookie card have cleared $150, showing Collector interest remains for more solid role players as well.

Armando Reynoso (1990 Fleer Update #U-53): Armando Reynoso never panned out as hoped, but as the #1 international free agent signing of 1990 some collectors chased his rookie cards. High grade PSA 10s have still brought $75-100, not bad for an obscure name today. It showcases the speculative aspect of following cards of highly touted prospects.

Bobby Witt Jr. (1990 Bowman Traded #T94): Son of former MLB pitcher Bobby Witt, young Bobby Jr. generated lots of early buzz as one of the best prep baseball players in the country. Though he topped out in A-ball, some collectors paid over $50 for PSA 10s of this teenage prospect card at the time, showing how prospect fever could drive values.

1990 featured several future Hall of Famers and established stars in their earliest card years as prospects. Keys like Frank Thomas, Chipper Jones, Derek Jeter, Curt Schilling, and Jim Thome pre-rookies from this period have shown impressive returns for high grade PSA/BGS slabs in recent years. Additional solid role players and prospects from 1990 may also hold nostalgic value even if they didn’t pan out. The 1990 pre-rookie class reinforced just how much untapped potential was bursting through the minor leagues and onto baseball’s biggest stage in the coming years ahead.