David Cotterill has followed Mark Duffy in leaving Rovers to join Birmingham City.
The Welsh winger has penned a two-year deal at St Andrews following the end of his Rovers contract.
It is understood Rovers were particularly keen on retaining Cotterill this summer along with Richie Wellens and James Coppinger.
But Cotterill was understood to have wanted to move closer to home in South Wales to be closer to his two children following his divorce.
The Wales international had hinted at a potential move away from the Keepmoat when he took to Twitter earlier this month, laying bare struggles in his personal life.
Cotterill thanked boss Paul Dickov, his teammates and fans for their support during ‘the worst period’ of his life.
He tweeted: “A lot of people [are] asking about my future regarding [Doncaster Rovers]. I don’t know what is happening yet.
“All I want to say is thank you to everyone at the club.
“The last four months I’ve been going through a divorce and the manager and my teammates have helped me get through the worst period of my life.
“Not being able to see my kids has been the biggest challenge of all. So fans, the management, staff and teammates, thank you.”
Cotterill spent two years with Rovers having been signed by Dean Saunders in the summer of 2012.
He made 92 appearances during that time, scoring 14 goals. The 26-year-old finished the 2012/13 League One title winning campaign as the top assist provider across the top four English leagues.