Admit it: A year ago, you knew almost nothing about Pedro Ciriaco.

Join the club.

The Red Sox had only recently signed Ciriaco to a minor league contract and invited him to spring training, where he arrived as arguably the most anonymous player in the clubhouse. A rail-thin infielder with 31 games of major league experience for the Pittsburgh Pirates, he was a longshot, at best, to make the team.

But by the end of camp, there was Ciriaco, batting .419 with seven doubles and eight stolen bases in 26 exhibition games, the latest player to emerge from the obscurity of a non-roster invitation and unexpectedly push for a spot on the Opening Day roster.

Who will it be this year?

While most of our attention in spring training will focus on Jon Lester's attempt to pitch like an ace again, the health of David Ortiz' right Achilles and Mike Napoli's troublesome hips, and the coalescence of an overhauled roster under new manager John Farrell, several unexpected story lines are bound to develop, too.