Billy Butler, with the Royals in 2013.
Target: Billy Butler, 1B/DH, Kansas City Royals
2013 stats: 162 games, .289 batting average, .374 on-base percentage, 27 doubles, 15 home runs, 82 RBIs.
Butler is basically a one-trick pony, but his one trick is pretty dang good. Other than David Ortiz, there probably isn't a better full-time DH in baseball than Butler, who had a career year in 2012 with a .313 batting average, 29 homers and 107 RBIs. His 2013 numbers weren't that good, but they were still pretty salty.
Butler would come at a price in the trade market. He's set to make $8 mililon in 2014 before a 2015 club option of $12.5 million. That's a pretty decent salary for a hitter of Butler's caliber, as he could immediately slide into the third spot in the Rangers order, even though he does have a tendency to hit into double plays with his lack of speed.
He's a disciplined hitter, as evidenced by his better-than-average on-base percentage and would be a nice addition in that regard to the Rangers' lineup.