9:11pm: The Rockies are out on Cantu, according to Rosenthal (via Twitter).
3:49pm: The Giants are "not heavily considering" Cantu, a source told Henry Schulman of the San Francisco Chronicle (Twitter link). The Rockies are still looking at Cantu, according to Jon Heyman of SI.com (Twitter link).
8:25am: The Giants are making a strong run for Marlins corner infielder Jorge Cantu, reports Ken Rosenthal of FOX Sports. They may hold an edge over the Rangers and Rockies, who remain involved. He says the Fish are believed to be seeking a young lefthander. The Giants have been using Travis Ishikawa at first base lately, while third baseman Pablo Sandoval is set to return from personal leave tonight.
In terms of young lefties, the Giants have reliever Dan Runzler on the DL with a knee injury and starter Eric Surkamp at High A. Clayton Tanner and Craig Clark also fit into their Baseball America top 30 prospect list heading into the season. Joe Martinez cracked the list the prior year. The Marlins asked about Tanner during the Winter Meetings, writes Clark Spencer of the Miami Herald.
Yesterday ESPN's Jayson Stark wrote that the Rangers and Marlins' talks for Cantu appeared hung up over dollars. The Rangers want the Marlins to assume all of the $2.22MM remaining on Cantu's contract.
Cantu, by the way, names the Marlins as his first choice when he hits the free agent market (ESPN's Amy K. Nelson via Twitter).