By Daniel Chavkin The Baltimore head coach isn’t concerned that Jackson isn’t at OTAs. View the original article to see embedded media. Lamar Jackson isn’t at Ravens voluntary OTAs as his contract will expire after this season, but head coach John Harbaugh said he isn’t concerned about Jackson being away from the team. Harbaugh expects Jackson to return for mandatory minicamp and doesn’t think being away from the team will have a huge impact on his performance. “I expect him to be here at mandatory minicamp,” Harbaugh said, via NFL.com. “I know he’s working hard. Lamar Jackson’s a hard worker,…