"With Aaron Hill returning to the Diamondbacks on a two-year, $11 million deal, the Tigers believe they may need to turn to the trade market to fill their opening at second base.

The Tigers are interested in Atlanta's Martin Prado, sources say. He's available, too.

Prado started at second base for the National League in the 2010 All-Star Game, but his production declined this year as he battled injuries and dealt with a position switch to left field. He has a career .801 OPS when batting first, and Detroit is looking for a leadoff man."