Connor held that position in Texas for two seasons before he was hired last winter to serve as manager Buck Showalter's pitching coach. Connor cited personal reasons for leaving that post.
The Orioles pitching staff posted a 4.22 ERA under Connor and has struggled mightily since, entering Wednesday with a 5.73 ERA due to injuries and underperforming young pitchers including Brian Matusz, Jake Arrieta, Zach Britton and Chris Tillman, among others.
The 62-year-old Connor served as the bullpen coach for the Rangers from 2003-05, and was named the team's pitching coach the following season. He was dismissed from that post in August, 2008 and rehired as a consultant later that year.