The forward duo have been made available for loan with a view to a permanent exit in January after failing to trouble the scorers since their moves to Sixfields.
Johnson's decision on Robinson will hurt the Northampton boss the most after he hailed his summer arrival as a 'fantastic signing for this football club.'
The former Brighton man had finished last season in fine form for Torquay United where he had been on loan from Shrewsbury.
Check out the career stats of both Robinson and Savage by clicking below.
http://www.northamptontown-mad.co.uk/players/current_squad_list.asp