As the offseason continues following the 2015 NFL Draft, 49ers.com looks back on how San Francisco's current roster was built.
2004
Draft: P Andy Lee
2006
2007
2008
Free agency: DT Justin Smith
2009
2010
2011
Free agency: NT Ian Williams, LB Michael Wilhoite
2012
Free agency: TE Garrett Celek
2013
2014
2015