http://sports.yahoo.com/mlb/players/6039/splits;_ylt=AoopjJeXIDjxUUPDCV0WTvWFCLcF?year=career&type=Batting
Lets look at his career home/road stats, shall we?
Home (836 games)- 761 for 3013 (.253 avg) (.311 obp) (.416 slg) (.727 ops) 144 Doubles, 5 Triples, 113 HRs, 389 RBIs, 397 Runs, 234 Walks, 525 Ks, 60 for 87 SBs
Road (845 games)- 939 for 3272 (.287 avg) (.338 obp) (.488 slg) (.826 ops) 204 Doubles, 21 Triples, 137 HRs, 517 RBIs, 431 Runs, 244 Walks, 559 Ks, 51 for 72 SBs
EDIT: The Red Sox are shopping Mike Lowell, so they can officially clear space for Beltre
http://fullcount.weei.com/sports/boston/baseball/red-sox/2009/12/09/rumor-mill-at-this-hour-11-am-3/