1909-1911 T206 (Christy Mathewson)
Enjoying a great reputation, Christy Mathewson used a specialty pitch which was comparable to a screwball. He was truly amazing and was one of the first inductees of the Baseball Hall of Fame, along with Walter Johnson, Honus Wagner, Ty Cobb, and Babe Ruth. This is written on the Pitcher’s plaque at the Hall: “Matty was master of them all.” There are three Christy Mathewson cards in the T206 set. Of the three cards, the most difficult is the White Cap variation while the most popular is the Portrait. A PSA 9 copy of the 1909 T206 Mathewson sold for a whopping $264,000 in September 2018.
1939 Play Ball (Ted Williams)
Like Babe Ruth or Mickey Mantle, Ted Williams has a lot of iconic, rare, and valuable cards to choose from, but the mainstream rookie cards are the most popular. This 1939 Play Ball is the true rookie card of the star. It was made in the 1930s, so it is not that hard to find the card. However, high-grade copies are hard to come by all the same. In November 2016, a 1939 Play Ball Williams with PSA 9 sold for $239,000.