To pick 3: Miranda, Julien & Larnach, simply because their collective careers are depending on not only a hot start, but an entire season of good hitting.
Based on positional needs: Julien, Martin and Lee at 2B - Keaschel, (and to an extent Eeles, though he is not at MLB ST) is knocking on the door with Culpepper right behind him. All three may not break camp with the team, Lee is out playing Martin right now, and Martin may be considered more of an OF these days anyway. All three have options though and can get reps in AAA.