Free Agent Notes: Santana, Burres, Hanrahan, Madson

Johan Santana will throw for interested teams at some point soon, Darren Wolfson of 1500ESPN.com tweets. When he does, the Twins will be in attendance. Yesterday, Santana himself indicated that he had begun throwing off a mound, the latest step in his recovery from shoulder surgery. Here are more notes on free agents, all of them pitchers.

• Brian Burres threw for teams on Thursday, and he will throw again on Monday in Florida, MLBTR's Tim Dierkes has learned. Burres last appeared in the big leagues in 2011 with the Pirates. He spent 2012 in the Giants' system, and 2013 in Taiwan.
• The Red Sox continue to "check in on" reliever Joel Hanrahan, Rob Bradford of WEEI.com reports (via Twitter). Hanrahan's agent told MLBTR yesterday that Hanrahan would host a showcase for interested teams in March. Hanrahan is making his way back after a 2013 season mostly lost to elbow troubles. 
• The Red Sox watched Ryan Madson on Friday in Arizona, Nick Cafardo of the Boston Globe tweets. Like Hanrahan, Madson is a once-dominant reliever trying to make his way back after dealing with elbow problems. The Phillies are among the teams that have shown interest in Madson, who last appeared in the big leagues in 2011 as a Phillie.