Where did these guys come from: Oklahoma City

Courtesy of Brian McTaggart, we have the minor-league rosters set. So where did these guys come from? Let's start with Oklahoma City:

Pitchers

Juan Abreu - Acquired via trade with Braves, 7/31/11
Xavier Cedeno - Signed as free agent, 1/5/11
Paul Clemens - Acquired via trade with Braves, 7/31/11
Enerio Del Rosario - Claimed off waivers from Reds, 9/16/10
Adalberto Flores - Signed as free agent, November 2011
Dallas Keuchel - Drated, 7th Round - 2009
Jordan Lyles - Drafted, 1st Round (supp) - 2008
Sergio Perez - Drafted, 2nd Round - 2006
Aneury Rodriguez - Rule 5 pick, 2009
Mickey Storey - Acquired via trade with A's, 7/1/11
Jose G. Valdez - Signed as free agent, November 2009

Catchers

Carlos Corporan - Signed as free agent, November 2010
Landon Powell - Signed as free agent, March 2012

Infielders

Diory Hernandez - Signed as free agent, December 2011
Mike Hessman - Signed as free agent, February 2012
Scott Moore - Signed as free agent, November 2011
Jimmy Paredes - Acquired via trade with Yankees, 7/31/10
Brett Wallace - Acquired via trade with Blue Jays, 7/29/10

Outfielders

Collin DeLome - Drafted, 5th Round - 2005
Jake Goebbert - Drafted, 13th Round - 2009
Fernando Martinez - Claimed off waivers from Mets - 1/11/12
Brad Snyder - Signed as free agent, November 2011