The 2016 World Series champions still have their core in 2019, but have now seem to have an aging team. They can still contend, though. This is how they were built.
Catchers
Willson Contreras
Contreras signed as an amateur free agent in July 2009.
Taylor Davis
Davis signed in July 2011 as an amateur free agent.
Infielders
Anthony Rizzo
Rizzo was acquired in January 2012 from the Padres with Zach Cates for Andrew Cashner and Kyung-Min Na.
Ben Zobrist
Zobrist signed a four year deal with the Cubs in December 2015.
Javier Baez
Baez was the 9th overall pick in the 2011 draft.
Kris Bryant
Bryant was the 2nd overall pick in 2013.
Daniel Descalso
Descalso signed a three year deal with the Cubs in December.
David Bote
Bote was drafted in the 18th round in 2012.
Outfielders
Jason Heyward
Heyward signed an eight year deal in December 2015.
Kyle Schwarber
Schwarber was drafted 4th overall in 2014.
Albert Almora Jr.
Almora was drafted 6th overall in 2012.
Mark Zagunis
Zagunis was drafted in the 3rd round in 2014.
Pitchers
Kyle Hendricks
Hendricks was acquired in July 2012 from the Rangers with Christian Villanueva for Ryan Dempster.
Cole Hamels
Hamels was acquired in July from the Rangers with cash for Eddie Butler, Rollie Lacy and Alexander Ovalles.
Yu Darvish
Darvish signed a six year deal with the Cubs in February 2018.
Jose Quintana
Quintana was acquired from the White Sox in July 2017 for Eloy Jimenez, Dylan Cease, Bryant Flete and Matt Rose.
Tyler Chatwood
Chatwood signed a three year deal with the Cubs in December 2017.
Tim Collins
Collins signed with the Cubs in March.
Allen Webster
Webster signed with the Cubs in March 2018.
Kyle Ryan
Ryan signed with the Cubs in January 2018.
Randy Rosario
Rosario was claimed off waivers from the Twins in November 2017.
Brandon Kintzler
Kintzler was acquired in July from the Nationals for Jhon Romero.
Steve Cishek
Cishek signed with the Cubs in December 2017.
Brad Brach
Brach signed with the Cubs in February.
Pedro Strop
Strop was acquired in July 2013 from the Orioles with Jake Arrieta for Scott Feldman and Steve Clevinger.
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Jon Lester
Lester signed a six year deal with the Cubs in December 2014.
Tony Barnette
Barnette signed with the Cubs in February.
Brandon Morrow
Morrow signed a two year deal with the Cubs in December 2017.
CarterHud 