Heyman notes the Angels are looking to trade Dan Haren and/or Ervin Santana.
http://www.cbssports.com/mlb/blog/jon-heyman/20740083/angels-exploring-trades-for-haren--greinke-before-option-decision-is-due
Both have option years for 2013, and if their options are picked up both are fairly pricey: Haren's is for $15.5 million and Santana $13 million. Neither had fantastic years (Santana in particular, who also experience a drop in velo), but both have a track record of success