The Tigers plan to go into the season with Ryan Raburn and Ramon Santiago as their second base platoon, according to MLB.com's Jason Beck. Raburn is entering the second half of a two-year contract signed last winter and will be used primarily at second base with Santiago this season. His share of the playing time remains in question. The Tigers agreed to a minor league contract with journeyman Eric Patterson earlier this week and could view Patterson as insurance if they decide not to make any upgrades through free agency.