Kevin Thomson has become the latest in a succession of SPL players to join Gordon Strachan at Middlesbrough, having completed his transfer on Friday.
Thomson, 25, has signed a four-year contract at the Riverside and joins the Championship club for a fee of £2 million. Rangers were willing to sell as Thomson had only 12 months left on his contract at the financially-troubled club.
The Scotland midfielder joins former Ibrox team-mate Kris Boyd at Middlesbrough, while Strachan has also recruited the likes of Scott McDonald, Stephen McManus and Wilo Flood from the SPL.
"Kevin knows the game and he's got great determination about him, very much in the Robbo (Barry Robson) mould," Strachan told the club's official website.
"He's also a more disciplined player than most but he isn't just a sitting midfielder. He's a very good passer, he retains the ball well and he's scored some important goals in Scotland. He's an excellent signing."
A Rangers statement read: "As he was entering the final year of his contract, we felt the offer was good for both the player and the club."