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Authentic Signed MLB Memorabilia

From Babe Ruth to Derek Jeter, baseball has given us some of the most iconic moments in sports history — and at Sports Integrity, we bring those moments home. Browse our full collection of signed MLB memorabilia, including autographed baseballs, signed baseball jerseys, autographed bats, and rare collectibles from Hall of Famers and current stars alike.

Every item is 100% authenticated by PSA/DNA, Beckett, JSA, or Fanatics — backed by our 200% money-back guarantee. With over 25 years in the business and new inventory added daily, Sports Integrity is your most trusted source for authentic baseball collectibles.

Shop by category: Signed Baseball Bats, Signed MLB Jerseys, Signed Baseball Photos.

Ronald Acuna Jr. Atlanta Braves Signed Official MLB Baseball BAS ITP

Ronald Acuna Jr. Atlanta Braves Signed Official MLB Baseball BAS ITP
The Sports Integrity Paul Skenes Pittsburgh Pirates Signed Official MLB Baseball features a blue autograph across one panel and comes with an MLB hologram for authenticity.

Paul Skenes Pittsburgh Pirates Signed Official MLB Baseball MLB Authentic
This Sports Integrity Juan Soto New York Mets Signed Official MLB Baseball (BAS) features blue signature and "20 20" inscription on a classic ball with red stitching; background shows an MLB logo ball with commissioner's signature.

Juan Soto New York Mets Signed Official MLB Baseball BAS
A white official MLB baseball by Sports Integrity, featuring Bryce Harper’s autograph in blue ink for the Philadelphia Phillies, authenticated by Fanatics.

Bryce Harper Philadelphia Phillies Signed Official MLB Baseball Fanatics MLB
Elly De La Cruz Cincinnati Reds Signed Official MLB Baseball BAS

Elly De La Cruz Cincinnati Reds Signed Official MLB Baseball BAS
Jennie Finch Signed Jennie Finch World Series Dudley Softball USA PSA/DNA

Jennie Finch Signed Jennie Finch World Series Dudley Softball USA PSA/DNA
Mason Miller Athletics Signed 2024 MLB All Star Game Baseball The Reaper BAS

Mason Miller Athletics Signed 2024 MLB All Star Game Baseball The Reaper BAS
Sports Integrity Jimmy Rollins Phillies Signed Official Gold Glove Baseball features a blue autograph, “4x GG,” and jersey number “11” inscribed below the signature, authenticated with a PSA hologram.

Jimmy Rollins Phillies Signed Official Gold Glove Baseball 4x GG PSA Hologram
Sammy Sosa Chicago Cubs Signed Official MLB Baseball BAS

Sammy Sosa Chicago Cubs Signed Official MLB Baseball BAS
Mariano Rivera New York Yankees Signed Official MLB Baseball BAS

Mariano Rivera New York Yankees Signed Official MLB Baseball BAS
Sports Integrity Hideki Matsui Signed New York Yankees 2009 WS Baseball with "WS MVP" inscription, authenticated by JSA.

Hideki Matsui Signed New York Yankees 2009 WS Baseball WS MVP Inscribed JSA
The Sports Integrity Nolan Ryan Texas Rangers Signed Rawlings Official MLB Baseball features his blue ink signature and "5714 K's" inscription, authenticated by PSA/DNA.

Nolan Ryan Texas Rangers Signed Rawlings Official MLB Baseball 5714 K's PSA/DNA
A Sports Integrity official MLB baseball with red stitching, signed in blue by Walker Buehler (#21), Boston Red Sox.

Walker Buehler Boston Red Sox Signed Official MLB Baseball BAS
The Sports Integrity Paul Skenes Pittsburgh Pirates Signed Official MLB Baseball comes with a blue-ink signature and is showcased in a clear glass case with a dark wooden base, complete with MLB hologram authentication.

Paul Skenes Pittsburgh Pirates Signed Official MLB Baseball MLB Hologram w/ Case
Trea Turner Philadelphia Phillies Signed Official MLB Baseball w/ Case BAS ITP - Sports Integrity

Trea Turner Philadelphia Phillies Signed Official MLB Baseball w/ Case BAS ITP
Ken Griffey Jr Seattle Mariners Signed Official Hall Of Fame Logo Baseball BAS - Sports Integrity

Ken Griffey Jr Seattle Mariners Signed Official Hall Of Fame Logo Baseball BAS
Josh Jung Texas Rangers Signed 2023 World Series Baseball BAS

Josh Jung Texas Rangers Signed 2023 World Series Baseball BAS
Bobby Witt Jr Kansas City Royals Signed Official MLB Baseball BAS

Bobby Witt Jr Kansas City Royals Signed Official MLB Baseball BAS