Signing switch-hitting catcher Victor Martinez to a four-year deal was an aggressive move that filled a significant need for the Tigers: a lefthanded power threat with a high OBP. The decision to make Martinez the primary DH, however, turns him into just another player. His bat is special as a catcher but just ordinary relative to the high standards of the DH slot. Although Martinez's perceived poor defense is part of that decision, his glovework and throwing arm aren't that bad. Detroit's desire to make 24-year-old Alex Avila the starting catcher is a bit forced. Avila has yet to show he can hit above Double A, with a .237/.327/.383 line in the majors the last two seasons, after skipping Triple A. The Tigers may also need the DH slot for veteran Carlos Guillen, who took poorly to second base last year and whose bad knee may keep him from playing anywhere in the field. Detroit made a big investment in Martinez and in its 2011 season. Maximizing those investments means making Martinez the No. 1 catcher.