The Colombian ace has emerged as a target for Sam Allardyce following Joey O’Brien’s injury – sustained in the 0-0 draw with Chelsea – and talks between the two clubs are believed to be ongoing.
Armero was thought to be close to securing a temporary switch to AC Milan earlier this month, but the arrangement fell through, which has allowed the Londoners to move.
The 27-year-old only made his stay in Naples a permanent one over the summer, but he is already believed to be willing to move on.
With Allardyce likely to grant him guaranteed first-team action in the build-up to the World Cup, Armero may be tempted by a transfer to Upton Park before the deadline passes.
West Ham’s defensive injury woes have been well documented this term, but ‘Big Sam’ is hopeful that with the potential addition of the South American he may be able to field the sort of backline that can keep the Irons clear of relegation on a regular basis.