The Detroit Tigers have "shown interest" in Arizona Diamondbacks infielders Stephen Drew and Ryan Roberts, reports Jon Paul Morosi and Ken Rosenthal of FOX Sports:

The Detroit Tigers have shown interest in Arizona Diamondbacks infielders Stephen Drew and Ryan Roberts, major-league sources told FOXSports.com.

While Morosi and Rosenthal note it isn’t clear how advanced trade talks between the Tigers and Diamondbacks are, sources indicate "there has been dialogue between the clubs on scenarios involving one or both players."

Drew, 29, missed the start of the 2012 season while recovering from a broken ankle suffered last year. Since returning from the disabled list, the shortstop has hit at a clip of only .233/.277/.302. He owns a career OPS of .770, and his contract includes a mutual $10 million option for the 2013 season.

Beyond the Tigers, the Oakland Athletics have also recently been tied to Drew.

Roberts has been a utility player for the Diamondbacks over the past few seasons. The 31-year-old has hit at a clip of .239/.287/.353 this year and sports a career OPS of .725.

Detroit has been tied to several hitters and pitchers this summer. Regardless of the type of deal they potentially complete, the Tigers are telling teams that, for the time being, top third base prospect Nick Castellanos is unavailable, according to Bob Nightengale of USA Today.

The #Tigers are telling teams_at least right now_that prized 3B prospect Nick Castellanos is unavailable.

— Bob Nightengale (@BNightengale) July 16, 2012

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Should the Tigers use Castellanos as a trade chip this summer?

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