Perhaps this has been asked before but after mentioning that Ralph Callachan, Thomson Allan and Darren Jackson had played for 3 Edinburgh clubs in the Scottish League I was wondering if there was a Glasgow equivalent. Although there weren't many transfers between Rangers and Celtic, given that Glasgow had many Scottish League clubs up until the demise of Third Lanark (do Clydebank count as a "Glasgow" club?) there must have been a player who, for example, maybe played for Thirds, Partick and Queens Park.
For purposes of this question I'll count Clyde as a Glasgow club even though they were technically in Rutherglen they did also play at Firhill before moving to Cumbernauld..
oh- forgot about Mo Johnston- played for Partick, Celtic and Rangers of course! Any others?