We'll pause here to give you a chance to formulate a guess. Ready?
The answer is 19.
The Padres -- most notably general manager A.J. Preller -- have replaced 22 players from the 40-man roster that reported to Peoria, Ariz., last February. Fourteen of those changes have been made since the end of the 2014 season.
Here is San Diego's 40-man roster:
Starters -- Andrew Cashner, Tyson Ross, Ian Kennedy, Josh Johnson, Brandon Morrow, Robbie Erlin, Odrisamer Despaigne, Casey Kelly, Cory Luebke
Relievers -- Joaquin Benoit, Alex Torres, Nick Vincent, Dale Thayer, Kevin Quackenbush, Leonel Campos, Frank Garces, Tayron Guerrero, Shawn Kelley, Brandon Maurer , Aaron Northcraft
Derek Norris, Tim Federowicz
Yonder Alonso, Alexi Amarista, Clint Barmes, Jedd Gyorko, Taylor Lindsey, Tommy Medica, Will Middlebrooks, Yangervis Solarte , Cory Spangenberg
Matt Kemp, Wil Myers, Justin Upton, Will Venable, Carlos Quentin, Cameron Maybin, Abraham Almonte, Alex Dickerson , Rymer Liriano
Here are the players on the 40-man roster last February who are no longer with the team:
Starters -- Jesse Hahn, Juan Pablo Oramas, Donn Roach, Burch Smith, Eric Stults, Joe Wieland
Relievers -- Huston Street, Tim Stauffer, Keyvius Sampson, Patrick Schuster
Yasmani Grandal, Nick Hundley, Rene Rivera
Everth Cabrera, Chase Headley, Ryan Jackson
Seth Smith, Yeison Asencio, Kyle Blanks, Chris Denorfia, Reymond Fuentes