49ers' possible next breakout stars

Monday, we looked at the San Francisco 49ers' breakouts players in 2013. Today, let's look, in alphabetical order, at some of the candidates to take the next step in 2014:Adam Kilgore: Kilgore is a candidate to start if the 49ers don't re-sign 35-year-old free-agent center Jonathan Goodwin. Kilgore has been in the program for a few years and has played in some packages. He may soon get his chance to be a full-timer.Vance McDonald: The 2013 second-round pick improved as the season went on, especially as a blocker.