According to Nick Cafardo of the Boston Globe, the Twins have already checked in on Rays starter James Shields:

"James Shields, RHP, Rays — We suspect the Rays will field a lot of calls on him in the coming weeks. Whether they pull the trigger in order to obtain offense remains to be seen. With former Rays special adviser Gerry Hunsicker now in LA, the Dodgers may make a push to get Shields, but what could they give back? Ethier? It makes sense if they have their eye on Hamilton. But the Rays may not be able to carry Ethier's contract. They have already received inquiries on Shields from the Twins."

Shields, who will be entering his age-31 season in 2012, is top flight talent. He's averaged 33 starts and 222 innings per year over the last six seasons, and in the last three seasons has posted an 8.4 K/9 while allowing 1.2 base runners per inning.

In terms of his contract, Shields is due to make $9 million this season with a club option worth $12 million in 2014 that includes a $1 million dollar buyout. Neither of those costs are prohibitive for the Twins. Whether or not the Twins pull the trigger in any potential deal would likely have more to do with what Tampa Bay was requesting in terms of prospects.