Let's start off with the one that everybody's talking about.
While it was a tough call, the Ravens traded Anquan Boldin for financial purposes. They did so expecting Dennis Pitta to continue his upward trend and take over as Flacco's go-to target.
What they did not count on, however, was the hip injury that ended Dennis Pitta's 2013 season before it even began. Now they are faced with the uncomfortable situation of trying to replace 162 receptions (or 40 percent of Flacco's completions) from last year.
An open competition over training camp and the preseason has only served to provoke more questions. The two initial front-runners for the job have done nothing to ease concerns, and new candidates have popped up to complicate matters.
Tandon Doss has been invisible with the starters this preseason, and does not seem to have earned Joe Flacco's confidence. Deonte Thompson has missed every practice since the first preseason game with a foot injury and his return date is still unclear.
In their stead, a number of newcomers have impressed. A couple of rookie receivers have been fantastic in the preseason. Aaron Mellette and Marlon Brown will cause some incredibly difficult roster decisions at the wide receiver position.
The two newly acquired veterans also figure to be a big part of the rotation. Dallas Clark eventually beat out his competitor at the tight end position, Visanthe Shiancoe, and Brandon Stokley looks like a lock to be the main slot receiver this year which could make Doss expendable.
The final question mark of the receivers is Jacoby Jones. As a returner extraordinaire, the Ravens would like to keep his offensive snap count where it was last year. Unless somebody else steps up as a receiver, he may need to be more involved in the offense.
Unfortunately, we are barely any closer to knowing the answer to the title question than we were at the start of training camp. It seems like Torrey Smith, Jones and Stokley will get the bulk of the work early, but the younger players will get their chances to separate themselves in the regular season.
Exactly which young receivers end up making the final roster is another question.