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The San Francisco 49ers will have several new faces in the 2013 season, unlike last year, when they were able to retain almost their entire core. The 49ers have made a splash in the free-agent and trade markets.

This offseason, general manager Trent Baalke has added veterans Nnamdi Asomugha, Anquan Boldin, Glenn Dorsey, Craig Dahl, Phil Dawson, Marlon Moore and Colt McCoy.

The 49ers also fortified their roster through the draft, and although there will not be a lot of immediate starters among this draft class, there are several players who should make solid contributions.

The 2013 draft already appears to be substantially better than that of 2012, as LaMichael James was the only rookie who made any contribution, and that was only after backup running back Kendall Hunter was injured.

There are also several integral players who are no longer with the 49ers, including Alex Smith, Dashon Goldson, Delanie Walker, Isaac Sopoaga, Ricky Jean-Francois and Randy Moss.

These departures open some opportunities for new players to come in and contribute right away. The turnover of the roster will also create several tough position battles in training camp.

For a team like the 49ers, with Super Bowl aspirations, these jobs and playing time are intensely coveted. Let's take a look at 10 of the most intriguing position battles as we head towards the 2013 season.

All stats are courtesy of www.pro-football-reference.com.