Though many of the core spots in the lineup and on the pitching staff are filled, there will be some competition for jobs in this Phillies spring training camp.

A host of candidates will vie for what looks like just three openings in the bullpen. Actually there might only be two openings because team officials were very pleased with the work of Jeremy Horst last season and he could have an inside track on being the second lefty in the bullpen, joining Antonio Bastardo. In addition to Bastardo, Jonathan Papelbon, Mike Adams and Chad Durbin are set in the bullpen.

Relievers who will compete for jobs in the bullpen include Mike Stutes, Phillippe Aumont, Jake Diekman, Michael Schwimer, Justin De Fratus, B.J. Rosenberg, Raul Valdes, Joe Savery, Juan Cruz and others. We took a look at the bullpen situation a few days ago in this story (see story).

Though newcomer John Lannan comes into camp with a competitor’s attitude -- he says he must win a job -- he lines up to be the fifth starter behind Cole Hamels, Cliff Lee, Roy Halladay and Kyle Kendrick. Barring injury, the rotation is set.

In addition to the bullpen, much of the competition for jobs will come in the outfield and on the bench.

The Phils figure to keep five outfielders. Ben Revere is a lock in centerfield. Laynce Nix might have a leg up on a job because he’d bring some lefthanded pop off the bench. John Mayberry Jr. seems to have a good chance of making the club because of his versatility and ability to hit lefthanded pitching. Without Mayberry, the Phils would scramble for help in centerfield if Revere went down. Mayberry plays both corner outfield spots and first base. He would have some value on this team’s bench.

Using this admittedly loose blueprint -- things can change quickly with a trade or an injury -- the Phils would seem to have two open outfield spots with three main contestants. General manager Ruben Amaro Jr. is on record as saying he hopes newcomer Delmon Young becomes the team’s everyday rightfielder not too long after opening day. (Young could be slowed early in camp as he continues to recover from offseason ankle surgery.)

Despite his hope to have Young’s bat in the lineup, Amaro warns: “He’s going to have to show us he can do it.” The GM was talking about Young’s ability to play rightfield, a position he has not played since 2007.