Adam David Piatt (born February 8, 1976) is an American former professional baseball outfielder who played for the Oakland Athletics and Tampa Bay Devil Rays of Major League Baseball (MLB) from 2000 to 2003.

Piatt played baseball at Bishop Verot High School,[1] followed by a successful college career at Mississippi State University (MSU), helping lead the Bulldogs to multiple NCAA Tournament appearances.

Piatt played mostly at third base for MSU and was named to the second team All-Southeastern Conference unit in 1997, when the Bulldogs reached the College World Series.

Piatt (who was trying to come back from viral meningitis) received HGH and testosterone from Kirk Radomski and used them in the 2002–2003 off-season.

Former Senator George Mitchell commended Piatt for his honesty, and for being one of the few players to come forward to discuss the league's performance-enhancing drug use.