Just the one player with a big league debut as a Minnesota Twins on July 20.
Kevin Mulvey (P) – July 20, 2009 – Traded by the New York Mets with Carlos Gomez, Deolis Guerra and Philip Humber to the Minnesota Twins for Johan Santana on February 2, 2008. Mulvey’s debut was a short one, facing just one batter and retiring him on four pitches to close out the 14-13 loss to the Oakland A’s in Oakland-Alameda County Coliseum.