One of the reasons why the San Francisco 49ers have become consistent contenders over the course of the past three seasons is the way the team has been built.General manager Trent Baalke is a staunch believer in building through the draft and it shows. ESPN's Kevin Seifert wrote Monday about how NFL teams are built. The 49ers are in a four-way tie for the second most homegrown players. The 49ers have 30 players on their roster who they drafted. The Green Bay Packers lead the NFL with 33 players.