J T Sports is proud to offer PSA Authentication & Grading for professional model game used bats and Authentication of professional model game worn gloves. PSA is a division of Collectors Universe, the nation’s leader in third party Authentication & Grading Services for your high value collectibles.

Bats submitted for PSA Authentication and Grading will be evaluated by PSA's 25 step procedure to determine the authenticity of the bat and it’s extent of game use by the player. Resources at hand include a substantial library of player images from 1900 to the present, an extensive database of professional model game used bats and access to detailed player ordering records allowing us to determine specific information regarding bats ordered by the players.

Professional model gloves are measured against criteria developed by the foremost authority on game used gloves in the country, Dennis Esken. As with game used bats, our glove resources include a sizable image database, complemented by our database of PSA authenticated professional player gloves and access to manufacturers information, highlighted by player requests customizing the glove to their specifications.

Sports Investors Authentication is a premier sports authentication team focusing on game-used baseball, hockey, football, and basketball jerseys and other game-used memorabilia. Our team at Sports Investors Authentication exists to provide the highest overall quality sports memorabilia authentication services. We are setting the standard with our collective expertise, genuine care for our clients and partners, and bringing integrity to the industry.

For authentication, SPI will provide a letter detailing its full evaluation of your item. The letter delineates item specifications, portrays general item photos, designation of game use (if applicable), identification of performance and milestones (if any), brief explanation of provenance (case by case variation), and contains a final opinion with Managing Member and Lead Authenticator signatures.

Bill Henderson focuses his authentication practice nearly exclusively on MLB jerseys and is uniquely qualified to authenticate them. With an in-house collection of over 1000 team-issued jerseys and close to one million photos of game-worn jerseys in his library, Bill can authenticate your MLB jersey with an extremely high degree of confidence.

Bill is first and foremost a historian. He authored of the unabridged research volume “The Game Worn Guide to MLB Jerseys”, the standard industry reference, and has an unmatched intimate knowledge of all jerseys worn by MLB Teams over the past many decades. His years of researching and documenting team-issued MLB Jerseys has qualified him to serve as an authenticator for many of the largest auction houses in the industry. He can help you protect your investment by evaluating and confirming the authenticity of your jerseys.

If you choose to ask for a quote below, Bill offers a “quick look” rate where, after a cursory evaluation, he will tell you if your item warrants a deeper look and further evaluation and perhaps a full authentication. This unique service avoids you unnecessarily wasting your time or money with a full authentication if it is unwarranted.