No position on the San Francisco 49ers has more uncertainty than cornerback -- and it's not even close.

The team only has one solid starter in place, but there are several players who could emerge. Of course, the 49ers could add a cornerback in a dwindling free-agent market and will surely pick one or two in the May 8-10 draft.

Let's take a look at where the 49ers stand at cornerback:

Starters:

Tramaine Brock: A year ago, no one would have guess he would be the most reliable cornerback on the team. But Brock made the huge leap from a special teams to the No. 1 cornerback. He was terrific in 2013 and it earned him a four-year contract extension.

Chris Culliver: This is very fluid. The 49ers have confidence in Culliver, but, in a perfect world, he will play the nickel. Culliver, who has proven in the past he can play, missed all of last season with a torn ACL. Still, he's the type of player who would likely be a better No. 3 than a No. 2.

Slot candidates:

Eric Wright: The veteran is talented and has performed well in the past. Yet, he didn't do much last season. It was a mild surprise the 49ers re-signed him to a one-year deal. Wright, who was inactive by the end of the season, has a chance to help if he can gain the coaching staff's trust.

Chris Cook: He is the 49ers' lone offseason addition at the position so far. Cook, a second-round pick by Minnesota in 2010, has struggled at times -- on and off the field. But there are some positives; he's 6-foot-2 and the team wants him to play in press coverage. Also, he came at a cheap price, getting paid the league minimum with no bonus. Perhaps the light will come on with strong coaching.

Young players with potential:

Darryl Morris: He opened eyes on special teams as an undrafted rookie last season. Coaches think he can help on defense, too.

Dax Swanson: He's a practice-squad player who will get a chance to impress in training camp.

Departed:

Tarell Brown: Brown, a starter much of last season, went across the bay to Oakland for a one-year, $3.5 million deal. The 49ers wanted him back, but not at that price. He is solid and must be replaced.

Carlos Rogers: Cut by the 49ers, there's always a chance he could be brought back at a much reduced price. But I think the 49ers would like to move on.

Still possible:

Perrish Cox: It's telling that Wright was signed before he was. But similar to Rogers' situation, I guess the door can't be completely closed.

Potential future additions:

The remaining free-agent market is not overly enticing. The top players are Dominique Rodgers-Cromartie and Antonio Cromartie. Others include Champ Bailey and Jabari Greer. Rodgers-Cromartie would be a good fit, but he wants too much money. The good news for the 49ers is the draft is stacked at this position and they could easily find a starting-quality player in the early rounds.

Conclusion:

The 49ers need to add here and they will probably do it through the draft. If they get the right player, they should be fine. Having players like Culliver, Wright and Cook as a rotation player is not a terrible situation. The key will be, whoever is brought on to the team, he must be ready to contribute right away.