Angels righthander Dan Haren is drawing interest from “several teams,” including the Red Sox, according to a major league source.

The Angels are definitely exploring possibilities and could pull the trigger on a deal soon. They dealt Ervin Santana to the Royals on Wednesday for a lefty specialist prospect.

The big issue with Haren is the condition of his back, which was problematic for him last season, but improved late in the year.

The Angels can buy out Haren’s $15.5 million option for $3.5 million. They could also pick up the option and trade him.

Despite his back issues, Haren, 32, made 30 starts for the Angels last season and went 12-13 with a4.33 ERA. Since 2005, when he became a full time starter for Oakland, Haren has never had fewer than 30 starts and has pitched 200-plus innings seven times.