The market for Ervin Santana appears to be heating up.

The Colorado Rockies, Baltimore Orioles, Seattle Mariners, New York Yankees and Los Angeles Dodgers are all interested, according to a source.

The Miami Marlins and Chicago Cubs also recently inquired about the right-hander, but their interest does not appear to be serious.

The Toronto Blue Jays, Arizona Diamondbacks, Kansas City Royals and Detroit Tigers could all become involved on Santana since Masahiro Tanaka and Matt Garza are off the market.