The person spoke to the AP on condition of anonymity Friday because the deal has yet to be announced.
Logan spent the past four seasons with the Yankees. He was 5-2 with a 3.23 ERA in 39 innings last season. Yankees general manager Brian Cashman confirmed Logan will not return to the Bronx.
"He did a great job for us," Yankees general manager Brian Cashman said of Logan. "He came in to be the second left-hander and because of injuries to the primary lefty he became out primary lefty and he handled it. He pitched in an exciting environment and responded strongly to it. I wish Boonie the best of luck, they're tough losses overall, but again, the team is changing all the time so it's out job to find replacements."
The 29-year-old Logan was drafted in the 20th round by the Chicago White Sox in 2002.
Information from The Associated Press was used in this report.