The Chicago Cubs are one of several teams interested in signing free agent left-hander Jonathan Sanchez.

The Cubs envision Sanchez as a reliever, according to a source. Several other teams interested in Sanchez prefer to employ him as a starter -- a role that Sanchez has performed for most of his career.

Sanchez has limited left-handed batters to a .218 batting average.

Sanchez, 31, threw a no-hitter in 2009 and won 13 games for the Giants in 2010 but has been hampered by control problems. Sanchez has pitched for the Rockies, Royals and Pirates.