2014 Outlook: Considered more of a fallback option at third base for the White Sox than a prime candidate to start, Semien nevertheless shouldn't receive the "ho-hum" approach in deeper fantasy leagues. He's capable of chipping in a few homers and steals, averaging 19 and 20 per 162 games played in his minor league career. At the very least, Semien should make the White Sox as a utility infielder, so consider him a back-of-your-roster option in those AL-only formats.
2014 Outlook: Keppinger has managed to average about 450 plate appearances a year for the past six seasons, but will be lucky to pick up half of that this year, especially if his surgically repaired shoulder delays his 2014 availability. Keppinger's strength has always made outstanding contact, resulting in a favorable average. His power is minimal and his speed is less than that. He does carry eligibility at first, second and third, so he makes for a defensible endgame play in the deepest of formats so long as your counting stats are up to snuff.
2014 Outlook: Davidson, the 2013 All-Star Futures Game MVP, was traded this winter to the Chicago White Sox, for whom he'll presumably start at third base. A regular gig hardly guarantees him mixed league value, however, as he remains a player honing his skills, including his defense, which needs the most work. That will be the primary obstacle he must hurdle on his way to regular at-bats, but he has both the power and patience to put up useful numbers at U.S. Cellular Field. Davidson might be able to bat between .260 and .270 with 20 homers and a .340 on-base percentage, and that could even land him on the mixed league radar. Keep tabs on him this spring.