According to Jon Paul Morosi and Ken Rosenthal of FOXSports.com, the St. Louis Cardinals and San Diego Padres are among four teams currently pursuing free agent infielder Felipe Lopez. Morosi or Rosenthal did not indicate who the other two teams are.

Lopez recently fired his agent Scott Boras last week. It was believed that he switched agents because Boras could not find Lopez a starting job.

The Cardinal’s need for Lopez may be linked to Brendan Ryan’s recent wrist surgery. The Padres do not have much middle infield depth and could use Lopez to give rest to Everth Cabrera and David Eckstein.

Lopez, 29, hit .310 with 9 home runs and 57 RBIs with the Arizona Diamondbacks and Milwaukee Brewers in 2009. You can see Lopez’s contract history and statistics here.